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obsessive

ob·ses·sive

obsessive

 
pronunciation:
b se sihv
part of speech: adjective
definition: of, pertaining to, characterized by, or causing an obsession.
His obsessive cleanliness had begun to worry his wife.She often engages in obsessive behavior.Gambling can become obsessive.
synonyms:
compulsive, driven, fixated
similar words:
absorbed, ardent, fanatical, immersed, neurotic, rabid
derivations: obsessively (adv.), obsessiveness (n.)