1. 强迫性的：obsession 迷住 | obsessive 强迫性的 | obsidian 黑曜石

2. 执念的：执念obsessiveness | 执念的obsessive | 执念地obsessively

3. 萦扰的：obsessive 执念的 | obsessive 萦扰的 | obsessively 妄想地

4. 使人着迷的,妄想的：immature 幼稚的 | obsessive 使人着迷的,妄想的 | wafer thin ice 别惹我发火

1. 着迷的；迷恋的；强迫性的；过分（到不正常程序）的
    If someone''s behaviour is obsessive, they cannot stop doing a particular thing or behaving in a particular way.

    e.g. Williams is obsessive about motor racing...
           威廉斯对赛车到了痴迷的程度。
    e.g. You were suffering from a period of obsessive depression after losing your job.
           你正处于失去工作后一段过度焦虑的抑郁期。

2. 着迷的人；强迫症患者
    An obsessive is someone who is obsessive about something or who behaves in an obsessive way.

    e.g. Obsessives, in any area, are invariably as boring as their hobbies...
           无论在哪个领域，过分痴迷者都会跟他们的癖好一样令人厌烦。
    e.g. I am not an obsessive. Not at all.
           我不是个强迫症患者，完全不是。

1. a person who has obsessions

1. characterized by or constituting an obsession

    e.g. the obsessional character of his response
           obsessive gambling

    Synonym: obsessional