Obsessional describes a feeling or habit that is like an obsession: an extreme, unhealthy interest or worry that takes over the mind so a person cannot think about much else. Doctors and psychologists use this word a lot — obsessional thoughts, obsessional habits.

Obsessionalobsessional這個詞 describes a feeling or habit用來形容一種感覺或習慣 that is like an obsession像執念一樣 an extreme, unhealthy interest or worry一種極端、不健康的興趣或憂慮 that takes over the mind佔據了整個心思 so a person cannot think about much else讓人幾乎沒辦法想別的事 Doctors and psychologists醫生和心理師 use this word a lot很常用這個詞 obsessional thoughtsobsessional thoughts（強迫性思考） obsessional habitsobsessional habits（強迫性習慣）

In ordinary conversation people more often say obsessive, and the two sit very close. Obsessional can sound a little more like a clinic or a textbook.

In ordinary conversation在日常對話裡 people more often say人們更常說 obsessiveobsessive and the two sit very close這兩個詞意思很接近 Obsessional can soundobsessional聽起來 a little more like a clinic or a textbook更像診間或教科書用語一點

It is not praise. It points to something that has gone too far and is crowding out the rest of life.

It這 is not不是 praise讚美 It points to something它指的是某件事 that has gone too far已經過頭了 and is crowding out the rest of life而且佔掉了生活裡其他事情的空間

The noun for the thing itself is obsession; this word describes that kind of thinking or behaviour.

The noun名詞形式 for the thing itself指這件事本身 is obsession是obsession this word而這個詞 describes形容的是 that kind of thinking or behaviour那種想法或行為