Addict
early 20th century: from the obsolete verb addict, which was a back-formation from addicted.
wiktionary
Borrowed from Latin addictus, past participle of addīcō(“deliver; devote; surrender”), from ad-(“to, towards, at”) + dīcō(“say; declare”)
etymonline
addict (v.)
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" (from PIE root *deik- "to show," also "pronounce solemnly"), but also "adjudge, allot." "It is a yielding to impulse, and generally a bad one" [Century Dictionary]. Related: Addicted; addicting.
addict (n.)
"one given over to some practice," 1909, first in reference to morphine, from addict (v.).
