If someone's behaviour is obsessive, they cannot stop doing a particular thing or behaving in a particular way.
例句
Williams is obsessive about motor racing...威廉斯對賽車到了癡迷的程度。You were suffering from a period of obsessive depression after losing your job.你正處于失去工作后一段過度焦慮的抑郁期。
N-COUNT
著迷的人；強迫癥患者
An obsessive is someone who is obsessive about something or who behaves in an obsessive way.
例句
Obsessives, in any area, are invariably as boring as their hobbies...無論在哪個領域，過分癡迷者都會跟他們的癖好一樣令人厭煩。I am not an obsessive. Not at all.我不是個強迫癥患者，完全不是。
英漢詞典釋義
adv.
過分地
Peter was obsessively jealous and his behaviour was driving his wife away.彼得過分嫉妒的舉止令他的妻子想離他而去。
英英詞典釋義
Adverb
1. in a compulsive manner;
"he cleaned his shoes compulsively after every walk"