addict (n.) Look up addict at Dictionary.com
"one given over to some practice," 1909, first in reference to morphine, from addict (v.).
addict (v.) Look up addict at Dictionary.com
1530s (implied in addicted) "to devote or give up (oneself) to a habit or occupation," from Latin addictus, past participle of addicere "to deliver, award, yield; make over, sell," properly "give one's assent to," figuratively "to devote, consecrate; sacrifice, sell out, betray, abandon," from ad "to" (see ad-) + dicere, which was usually "to say, declare" (see diction), but also "adjudge, allot." "It is a yielding to impulse, and generally a bad one" [Century Dictionary]. Related: Addicted; addicting.