horsehair (n.) Look up horsehair at Dictionary.com
late 14c., from horse (n.) + hair.
horsehide Look up horsehide at Dictionary.com
early 14c., from horse (n.) + hide (n.).
horseman (n.) Look up horseman at Dictionary.com
c. 1200, from horse (n.) + man (n.).
horsemanship (n.) Look up horsemanship at Dictionary.com
1560s, from horseman + -ship.
horseplay (n.) Look up horseplay at Dictionary.com
"rough, excessive play," 1580s, from horse (n.) with its associations of "strong, coarse" + play (n.).
horsepower (n.) Look up horsepower at Dictionary.com
1806, from horse (n.) + power (n.); established by Watt as the power needed to lift 33,000 pounds one foot in one minute, which is actually about 1.5 times the power of a strong horse.
horseradish (n.) Look up horseradish at Dictionary.com
1590s, Cochlearia armoricia; the common name preserves the once-common figurative sense of horse as "strong, large, coarse" (as in in obsolete horse mushroom, horse parsley, Old English horsminte "horse mint," etc.); also see radish.
horseshoe (n.) Look up horseshoe at Dictionary.com
late 14c. (early 13c. as a proper name), from horse (n.) + shoe (n.). Horseshoes as another name for the game of quoits, attested by 1822.
HORSE-SHOES, the game of coits, or quoits--because sometimes actually played with horse-shoes. [John Trotter Brockett, "A Glossary of North Country Words," 1829]
The belief that finding a horseshoe by chance is lucky is attested from late 14c., and the practice of nailing one above a doorway to prevent a witch entering therein was common in London down to c. 1800. Of a type of bend in a river, 1770, American English. As a type of crab, from 1775.
horsetail (n.) Look up horsetail at Dictionary.com
c. 1400, from horse (n.) + tail (n.). As a kind of plant, from 1530s.
horsewoman (n.) Look up horsewoman at Dictionary.com
1560s, from horse (n.) + woman. See horseman.
horsy (adj.) Look up horsy at Dictionary.com
1590s, from horse (n.) + -y (2). Related: Horsiness.
hortative (adj.) Look up hortative at Dictionary.com
c. 1600, from Latin hortativus, from past participle stem of hortari “to exhort” (see hortatory).
hortatory (adj.) Look up hortatory at Dictionary.com
1580s, from Middle French hortatoire and directly from Late Latin hortatorius "encouraging, cheering," from hortatus, past participle of hortari "exhort, encourage, urge, incite, instigate," intensive of horiri "urge, incite, encourage," from PIE root *gher- (5) "to like, want" (cognates: Old English giernan "to strive, desire, yearn;" Gothic gairnei "desire;" Greek khresthai "to lack, want; use, make use of," kharis "grace, favor," khairein "to rejoice, delight in;" Sanskrit haryati "finds pleasure, likes," harsate "is aroused;" Avestan zara "effort, aim;" Russian zhariti "awake desire, charm").
Hortense Look up Hortense at Dictionary.com
fem. proper name, from Latin Hortensia, fem. of Hortensius, a Roman gens name, related to hortus "garden" (see yard (n.1)).
horticultural (adj.) Look up horticultural at Dictionary.com
1778, from horticulture + -al (1).
horticulture (n.) Look up horticulture at Dictionary.com
1670s, "cultivation of a garden," fabricated from Latin hortus "garden" (see yard (n.1)) + cultura (see culture); probably on model of agriculture. Famously punned upon by Dorothy Parker.
horticulturist (n.) Look up horticulturist at Dictionary.com
1818, from horticulture + -ist. Earlier was horticultist (1754).
Horus Look up Horus at Dictionary.com
1851, Egyptian hawk-headed god, from Latin Horus, from Egyptian Hor, literally "the high-flying one."
hosanna Look up hosanna at Dictionary.com
Old English osanna, via Latin and Greek from Hebrew hosha'na, probably a shortening of hoshi'ah-nna "save, we pray" (see Psalms cxviii:25), from imperative of y-sh- (compare yeshua "salvation, deliverance, welfare") + emphatic particle -na. Originally an appeal for deliverance; used in Christian Church as an ascription of praise, because when Jesus entered Jerusalem this was shouted by Galilean pilgrims in recognition of his messiahhood (Matt. xxi:9, 15, etc.).
hose (v.) Look up hose at Dictionary.com
c. 1300, "to furnish with stockings," from hose (n.). Meaning "to water down with a hose" is from 1889. Related: Hosed; hosing.
hose (n.) Look up hose at Dictionary.com
late Old English, hosa "covering for the leg," from Proto-Germanic *husan (cognates: Old Saxon, Old Norse hosa, Middle High German hose "covering for the leg," German Hose "trousers"), literally "covering," from PIE *(s)keu- "to cover, conceal" (see hide (n.1)). Old French hose, Old Spanish huesa are of Germanic origin. Sense of "flexible rubber tube for liquid" is first attested late 15c.
Hosea Look up Hosea at Dictionary.com
masc. proper name, from Hebrew Hoshea, literally "salvation," from stem y-sh- "to save."
hoser (n.) Look up hoser at Dictionary.com
"contemptible person," also hose-head, by 1982, a term popularized by the Canadian parody comic sketch "Great White North" with the fictional McKenzie Brothers on SCTV.
hosier (n.) Look up hosier at Dictionary.com
late 14c., hosyere "hose-maker" (attested as a surname from late 12c.), from hose (n.) + -ier, French-influenced agent noun suffix.
hosiery (n.) Look up hosiery at Dictionary.com
stocking collectively, 1775, from hosier + -y (1). As "factory where hose is made," from 1803.
hospice (n.) Look up hospice at Dictionary.com
1818, "rest house for travelers," from French hospice (13c.), from Latin hospitium "guest house, hospitality," from hospes (genitive hospitis) "guest, host" (see host (n.1)). Sense of "home for the aged and terminally ill " is from 1893; hospice movement first attested 1979.
hospitable (adj.) Look up hospitable at Dictionary.com
1560s, from Middle French hospitable, from Latin hospitari "be a guest," from hospes (genitive hospitis) "guest" (see host (n.1)). Related: Hospitably.
hospital (n.) Look up hospital at Dictionary.com
mid-13c., "shelter for the needy," from Old French hospital, ospital "hostel" (Modern French hôpital), from Late Latin hospitale "guest-house, inn," neuter of Latin adjective hospitalis "of a guest or host," from hospes (genitive hospitis); see host (n.1). Later "charitable institution to house and maintain the needy" (early 15c.); sense of "institution for sick people" is first recorded 1540s.
hospitality (n.) Look up hospitality at Dictionary.com
late 14c., "act of being hospitable," from Old French hospitalité, from Latin hospitalitem (nominative hospitalitas) "friendliness to guests," from hospes (genitive hospitis) "guest" (see host (n.1)).
hospitalization (n.) Look up hospitalization at Dictionary.com
1873, noun of action from hospitalize.
hospitalize (v.) Look up hospitalize at Dictionary.com
1873, from hospital + -ize. "Freq[uently] commented on as an unhappy formation" [OED]. Related: hospitalized; hospitalizing.
hoss (n.) Look up hoss at Dictionary.com
1815, representing U.S. dialectal variant pronunciation of horse, especially as applied to (large or coarse) persons.
host (n.1) Look up host at Dictionary.com
"person who receives guests," late 13c., from Old French hoste "guest, host, hostess, landlord" (12c., Modern French hôte), from Latin hospitem (nominative hospes) "guest, host," literally "lord of strangers," from PIE *ghostis- "stranger" (cognates: Old Church Slavonic gosti "guest, friend," gospodi "lord, master;" see guest). The biological sense of "animal or plant having a parasite" is from 1857.
host (n.2) Look up host at Dictionary.com
"multitude" mid-13c., from Old French host "army" (10c.), from Medieval Latin hostis "army, war-like expedition," from Latin hostis "enemy, foreigner, stranger," from the same root as host (n.1). Replaced Old English here, and in turn has been largely superseded by army. The generalized meaning of "large number" is first attested 1610s.
host (n.3) Look up host at Dictionary.com
"body of Christ, consecrated bread," c. 1300, from Latin hostia "sacrifice," also "the animal sacrificed," applied in Church Latin to Christ; probably ultimately related to host (n.1) in its root sense of "stranger, enemy."
host (v.) Look up host at Dictionary.com
"to serve as a host," early 15c., from host (n.1). Related: Hosted; hosting.
hosta (n.) Look up hosta at Dictionary.com
1828, plant genus of the lily family, coined 1812 in Modern Latin for Austrian physician and botanist Nicolaus Thomas Host (1761-1834).
hostage (n.) Look up hostage at Dictionary.com
late 13c., from Old French hostage "person given as security or hostage" (12c., Modern French ôtage), either from hoste "guest" (see host (n.1)) via notion of "a lodger held by a landlord as security," or from Late Latin obsidanus "condition of being held as security," from obses "hostage," from ob- "before" + base of sedere "to sit" [OED]. Modern political/terrorism sense is from 1970.
hostel (n.) Look up hostel at Dictionary.com
early 13c., from Old French hostel "inn, lodgings, shelter" (11c., Modern French hôtel), from Medieval Latin hospitale "inn, large house" (see hospital). Obsolete after 16c., revived 1808, along with hostelry (Middle English hostelrie) by Sir Walter Scott. The sense in youth hostel is recorded by 1931.
hostelry (n.) Look up hostelry at Dictionary.com
late 14c. (as a surname from early 14c.), from Old French hostelerie "house, guest-house; kitchen; hospice, almshouse" (12c., Modern French hôtellerie), from hostel (see hostel). Lost, then revived 19c.
hostess (n.) Look up hostess at Dictionary.com
late 13c., "woman who keeps an inn or public hotel," from host (n.1) + -ess, or from Old French hostesse (Modern French hôtesse). Meaning "woman who presides at a dinner party, etc." recorded by 1822. Also used mid-20c. in sense "female who entertains customers in nightclubs," with overtones of prostitution.
hostile (adj.) Look up hostile at Dictionary.com
late 15c., from Middle French hostile "of or belonging to an enemy" or directly from Latin hostilis "of an enemy," from hostis "enemy" (see guest). The noun meaning "hostile person" is recorded from 1838, American English, a word from the Indian wars.
hostility (n.) Look up hostility at Dictionary.com
early 15c., from Middle French hostilité "enmity" (15c.), or directly from Late Latin hostilitatem (nominative hostilitas) "enmity," from Latin hostilis, from hostis "enemy" (see guest). Hostilities in the sense of "warfare" attested from 1610s.
hostler (n.) Look up hostler at Dictionary.com
late 14c., "one who tends to horses at an inn," also, occasionally, "innkeeper," from Anglo-French hostiler, Old French hostelier "innkeeper, steward" (12c., Modern French hôtelier), from Medieval Latin hostilarius "the monk who entertains guests at a monastery," from hospitale "inn" (see hospital). See also ostler.
hot (adj.) Look up hot at Dictionary.com
Old English hat "hot, flaming, opposite of cold," also "fervent, fierce, intense, excited," from Proto-Germanic *haita- (cognates: Old Saxon and Old Frisian het, Old Norse heitr, Middle Dutch and Dutch heet, German heiß "hot," Gothic heito "heat of a fever"), from PIE root *kai- "heat" (cognates: Lithuanian kaistu "to grow hot").

The association of hot with sexuality dates back to c. 1500. Taste sense of "pungent, acrid, biting" is from 1540s. Sense of "exciting, remarkable, very good" is 1895; that of "stolen" is first recorded 1925 (originally with overtones of "easily identified and difficult to dispose of"); that of "radioactive" is from 1942.

Hot flashes in the menopausal sense attested from 1887. Hot air "unsubstantiated statements, boastful talk" is from 1900. Hot stuff for anything good or excellent is by 1889. Hot potato in figurative sense is from 1846. The hot and cold in hide-and-seek or guessing games are from hunting (1640s), with notion of tracking a scent.
hot dog (n.) Look up hot dog at Dictionary.com
also hotdog, "sausage on a split roll," c. 1890, American English, from hot (adj.) + dog (n.). Many early references are in college student publications; later popularized, but probably not coined, by cartoonist T.A. "Tad" Dorgan (1877-1929). It is said in early explanations to echo a suspicion (occasionally justified) that sausages contained dog meat. Meaning "someone particularly skilled or excellent" (with overtones of showing off) is from 1896. Connection between the two senses, if any, is unclear. Hot dog! as an exclamation of approval was in use by 1906.
hot-dog, n. 1. One very proficient in certain things. 2. A hot sausage. 3. A hard student. 4. A conceited person. ["College Words and Phrases," in "Dialect Notes," 1900]
hot pants (n.) Look up hot pants at Dictionary.com
"short-shorts," 1970, from hot (adj.) + pants (n.). Probably influenced by earlier sense of "sexual arousal" (1927).
hot spot (n.) Look up hot spot at Dictionary.com
also hotspot, 1888 as a skin irritation; 1931 as "nightclub;" 1938 in the firefighting sense; 1941 as "place of international conflict." See hot (adj.) + spot (n.).
hot water (n.) Look up hot water at Dictionary.com
c. 1400, literal; 1530s in figurative sense of "trouble."
hot-blooded (adj.) Look up hot-blooded at Dictionary.com
"passionate," 1590s; a relic of medieval physiology theory.