Hertfordshire Look up Hertfordshire at Dictionary.com
Old English Heortfordscir, from Herutford (731), literally "ford frequented by harts."
Hertz Look up Hertz at Dictionary.com
unit of frequency equal to one cycle per second, 1928, named in reference to German physicist Heinrich Hertz (1857-1894).
Herzegovina Look up Herzegovina at Dictionary.com
former Austrian duchy in the Balkans, from Old Serbian herceg "duke" (related to Modern German Herzog) + possessive ending -ov + -ina "country."
hesitance (n.) Look up hesitance at Dictionary.com
c. 1600, from Latin haesitantia (see hesitancy).
hesitancy (n.) Look up hesitancy at Dictionary.com
1610s, from Latin haesitantia "action of stammering," from haesitantem (nominative haesitans) "stammering," present participle of haesitare (see hesitation).
hesitant (adj.) Look up hesitant at Dictionary.com
1640s, probably a back-formation from hesitancy, or else from Latin haesitantem. Related: Hesitantly.
hesitate (v.) Look up hesitate at Dictionary.com
1620s, from Latin haesitatum, past participle of haesitare (see hesitation). Related: Hesitated; hesitating.
hesitation (n.) Look up hesitation at Dictionary.com
c. 1400, from Old French hesitacion or directly from Latin haesitationem (nominative haesitatio) "a hesitation, stammering," figuratively "irresolution, uncertainty," noun of action from past participle stem of haesitare "stick fast, remain fixed; stammer in speech," figuratively "hesitate, be irresolute, be at a loss, be undecided," frequentative of haerere "stick, cling," from PIE *ghais-e (source also of Lithuanian gaistu "to delay, tarry"), from root *ghais- "to adhere; hesitate."
hesitative (adj.) Look up hesitative at Dictionary.com
1795, from hesitate + -ive. Related: Hesitatively.
Hesperus Look up Hesperus at Dictionary.com
late 14c., poetic for "the evening star," from Latin Hesperus, from Greek hesperos (aster) "western (star)," from PIE *wes-pero- "evening, night" (see vesper). Hence also Hesperides (1590s), from Greek, "daughters of the West," the nymphs (variously numbered but originally three) who tended the garden with the golden apples. Their name has been mistakenly transferred to the garden itself.
The Hesperides were daughters of Atlas, an enormous giant, who, as the ancients believed, stood upon the western confines of the earth, and supported the heavens on his shoulders. Their mother was Hesperis, a personification of the "region of the West," where the sun continued to shine after he had set on Greece, and where, as travellers told, was an abundance of choice delicious fruits, which could only have been produced by a special divine influence. The Gardens of the Hesperides with the golden apples were believed to exist in some island in the ocean, or, as it was sometimes thought, in the islands on the north or west coast of Africa. They were far-famed in antiquity; for it was there that springs of nectar flowed by the couch of Zeus, and there that the earth displayed the rarest blessings of the gods; it was another Eden. As knowledge increased with regard to western lands, it became necessary to move this paradise farther and farther out into the Western Ocean. [Alexander Murray, "Manual of Mythology," 1888]
Hessian (n.) Look up Hessian at Dictionary.com
"resident of the former Landgraviate of Hessen-Kassel," western Germany; its soldiers being hired out by the ruler to fight for other countries, especially the British during the American Revolution, the name Hessians (unjustly) became synonymous with "mercenaries." Hessian fly (Cecidomyia destructor) was a destructive parasite the ravaged U.S. crops late 18c., so named 1787 in erroneous belief that it was carried into America by the Hessians. The place name is from Latin Hassi/Hatti, the Latinized form of the name of the people the Romans met there. The meaning of the name is unknown.
hessonite (n.) Look up hessonite at Dictionary.com
1820, from French essonit (1817), from Greek heson "less" + -ite (2). So called because it is lighter than similar minerals.
hest (n.) Look up hest at Dictionary.com
"bidding, command," Old English hæs "bidding, behest, command," from Proto-Germanic *hait-ti-, from *haitan "to call, name" (see hight (v.)). With -t added in Middle English on model of other pairings (compare wist/wesan).
Hestia Look up Hestia at Dictionary.com
goddess of the hearth, from Greek hestia "hearth, house, home, family" (see vestal).
het (adj.) Look up het at Dictionary.com
"heated," archaic, late 14c., from variant past participle of heat (compare lead (v.)/led, etc.).
hetaera (n.) Look up hetaera at Dictionary.com
1820, "mistress," from Medieval Latin hetaera, from Greek hetaira "female companion," in Athens opposed to "lawful wife," and thus embracing everything from "concubine" to "courtesan;" fem. of hetairos "comrade, companion," from PIE *swet-aro-, suffixed form of root *s(w)e- (see idiom).
hetero- Look up hetero- at Dictionary.com
word-forming element meaning "other, different," from comb. form of Greek heteros "the other (of two), another, different;" first element meaning "one, at one, together," from PIE *sem- "one;" the second cognate with the second element in Latin al-ter, Gothic an-þar, Old English o-ðer "other."
heterodox (adj.) Look up heterodox at Dictionary.com
1630s, from Greek heterodoxos, from heteros "the other" (see hetero-) + doxa "opinion," from dokein "to appear, seem, think" (see decent).
heterodoxy (n.) Look up heterodoxy at Dictionary.com
1650s, from Greek heterodoxia "error of opinion," from heterodoxos (see heterodox).
heterogeneity (n.) Look up heterogeneity at Dictionary.com
1640s, from Medieval Latin heterogeneitas, from heterogeneus, from Greek heterogenes (see heterogeneous).
heterogeneous (adj.) Look up heterogeneous at Dictionary.com
1620s, from Medieval Latin heterogeneus, from Greek heterogenes, from heteros "different" (see hetero-) + genos "kind, gender, race stock" (see genus). Earlier in same sense was heterogeneal (c. 1600).
heterogenous (adj.) Look up heterogenous at Dictionary.com
1690s, less-correct form of heterogeneous. Related: Heterogeneity.
heterography (n.) Look up heterography at Dictionary.com
"incorrect spelling," 1783; see hetero- + -graphy. Also "inconsistent but current spellings within a language" (as English, in all ages), 1847.
heteromorphic (adj.) Look up heteromorphic at Dictionary.com
"having different or dissimilar forms," 1864; from hetero- + Greek morphe "form" (see Morpheus).
heteronomy (n.) Look up heteronomy at Dictionary.com
1798, "subjection to the rule of another power," from hetero- + Greek nomos "law" (see numismatics). Related: Heteronomic; heteronomous.
heteronym (n.) Look up heteronym at Dictionary.com
"word having the same spelling as another but with a different sound and meaning," 1880s, also "a thing's name in one language that is an exact translation of its name in another;" from hetero- + -onym "name" (see name (n.)). Related: Heteronymic; heteronymous.
heterophemy (n.) Look up heterophemy at Dictionary.com
"the (unintentional) use of some other word or phrase in place of the one that was meant," 1875, from hetero- + Greek pheme "utterance," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)).
heterosexist (adj.) Look up heterosexist at Dictionary.com
"characteristic of discrimination against homosexuals," 1979; see hetero- + sexist. Related: Heterosexism (1979).
heterosexual (adj.) Look up heterosexual at Dictionary.com
1892, in C.G. Craddock's translation of Krafft-Ebbing's "Psychopathia Sexualis," a hybrid; see hetero- + sexual. The noun is recorded from 1920, but not in common use until 1960s. Colloquial shortening hetero is attested from 1933.
heterosexuality (n.) Look up heterosexuality at Dictionary.com
1900; see heterosexual + -ity.
heterotroph (n.) Look up heterotroph at Dictionary.com
1900, from hetero- + Greek trophos "feeder" (see -trophy). Related: Heterotrophic (1893).
heterozygous (adj.) Look up heterozygous at Dictionary.com
1889, from heterozygote, from hetero- + zygote.
hetman (n.) Look up hetman at Dictionary.com
"Cossack commander," 1710, from Polish hetman, apparently from an early form of German Hauptmann "captain," literally "headman," from Haupt "head" (see head (n.)) + Mann (see man (n.)).
heuristic (adj.) Look up heuristic at Dictionary.com
"serving to discover or find out," 1821, irregular formation from Greek heuretikos "inventive," related to heuriskein "to find" (from PIE *were- (2) "to find;" cognate with Old Irish fuar "I have found") + -istic. As a noun, from 1860.
heuristics (n.) Look up heuristics at Dictionary.com
"study of heuristic methods," 1897, from heuristic (n.); also see -ics.
hew (v.) Look up hew at Dictionary.com
Old English heawan "to chop, hack, gash" (class VII strong verb; past tense heow, past participle heawen), earlier geheawan, from Proto-Germanic *hawwan (cognates: Old Norse hoggva, Old Frisian hawa, Old Saxon hauwan, Middle Dutch hauwen, Dutch houwen, Old High German houwan, German hauen "to cut, strike, hew"), from PIE root *kau- "to hew, strike" (cognates: Old Church Slavonic kovo, Lithuanian kauju "to beat, forge;" Latin cudere "to strike, beat;" Middle Irish cuad "beat, fight").

Weak past participle hewede appeared 14c., but hasn't displaced hewn. Seemingly contradictory sense of "hold fast, stick to" (in phrase hew to) developed from hew to the line "stick to a course," literally "cut evenly with an axe or saw," first recorded 1891. Related: Hewed; hewing.
hewer (n.) Look up hewer at Dictionary.com
"cutter" (of stone or wood), mid-12c. as a surname, agent noun from hew (v.). Hewers of wood and drawers of water as the lowliest sort of physical laborers is from Joshua ix:12.
hewn Look up hewn at Dictionary.com
strong past participle of hew.
hex (v.) Look up hex at Dictionary.com
1830, American English, from Pennsylvania German hexe "to practice witchcraft," from German hexen "to hex," related to Hexe "witch," from Middle High German hecse, hexse, from Old High German hagazussa (see hag). Noun meaning "magic spell" is first recorded 1909; earlier it meant "a witch" (1856).
hexa- Look up hexa- at Dictionary.com
before vowels, hex-, word-forming element meaning "six," from Greek hexa-, comb. form of hex "six" (see six).
hexadecimal Look up hexadecimal at Dictionary.com
1954 (adj.); 1970 (n.); from hexa- + decimal.
hexagon (n.) Look up hexagon at Dictionary.com
1560s, from Latin hexagonum, from Greek hexagonon, from hex "six" (see hexa-) + gonia "angle" (see -gon).
hexagonal (adj.) Look up hexagonal at Dictionary.com
1570s, from hexagon + -al (1). Related: Hexagonally.
hexagram (n.) Look up hexagram at Dictionary.com
1863 as a type of geometric figure, from hexa- + -gram. I Ching sense attested from 1882.
hexameter (adj.) Look up hexameter at Dictionary.com
1540s, from Latin hexameter, from Greek hexametros, from hex "six" (see hexa-) + metron "meter" (see meter (n.2)). As a noun from 1570s. Related: Hexametric.
hexane (n.) Look up hexane at Dictionary.com
paraffin hydrocarbon, 1872, from Greek hex "six" (see six) + chemical suffix -ane. So called for its six carbon atoms.
hexapod (n.) Look up hexapod at Dictionary.com
1660s, from Greek hex "six" (see six) + pod, from Greek pod-, stem of pous "foot," from PIE root *ped- (1) "a foot" (see foot (n.)). As an adjective from 1856.
hey (interj.) Look up hey at Dictionary.com
c. 1200, implying challenge, rebuttal, anger, derision; variously spelled in Middle English hei, hai, ai, he, heh. Later in Middle English expressing sorrow, or concern; also a shout of encouragement to hunting dogs. Possibly a natural expression (compare Roman eho, Greek eia, German hei, Old French hay, French eh).
Þa onswerede þe an swiðe prudeliche, `Hei! hwuch wis read of se icudd keiser!' ["St. Katherine of Alexandria," c. 1200]
In Latin, hei was a cry of grief or fear; but heia, eia was an interjection denoting joy.
heyday (n.) Look up heyday at Dictionary.com
late 16c., alteration of heyda (1520s), exclamation of playfulness or surprise, something like Modern English hurrah, apparently an extended form of Middle English interjection hey or hei (see hey). Modern sense of "stage of greatest vigor" first recorded 1751, which altered the spelling on model of day, with which this word apparently has no etymological connection.
Hezbollah (n.) Look up Hezbollah at Dictionary.com
extremist Shiite group active in Lebanon, founded c. 1982, from Persian hezbollah, Arabic hizbullah, literally "Party of God," from hezb/hizb "party" + allah "God." An adherent is a Hezbollahi. The name of various Islamic groups in modern times, the name itself is attested in English by 1960 in referense to an Indonesian guerilla battalion of 1945 that "grew out of a similarly named organization formed by the Japanese to give training in military drill to young Moslems."
In Modjokuto (like Masjumi itself, Hizbullah was Indonesia-wide but, also like Masjumi, it had little effective central organization) this group was led by the present head of Muhammadijah -- the same man who a year or so before was going to Djakarta for propaganda training and studying to be a kamikaze. [Clifford Geertz, "The Religion of Java," Chicago, 1960]