ADDICTIVE
addictive, habit-forming
(adjective) causing or characterized by addiction; “addictive drugs”; “addictive behavior”
Source: WordNet® 3.1
Etymology
First attested 1914. Addiction in modern sense is first attested 1906, in reference to opium. There is an isolated instance from 1779, with reference to tobacco.
Adjective
addictive (comparative more addictive, superlative most addictive)
Causing or tending to cause addiction; habit-forming.
Enjoyable.
Characterized by or susceptible to addiction.
Synonyms
• habit-forming
Antonyms
• nonaddictive
Noun
addictive (plural addictives)
A drug that causes an addiction.
Anything that is very habit-forming.
Source: Wiktionary