1
be obsessional about sth
介词 about 后接事物或活动，表示“对……过分执着”。
He is obsessional about keeping his desk tidy.
他对保持书桌整洁有强迫倾向。
强迫性的
先理解核心含义，再看它在真实句子里的用法。
强迫性的
characterized by or relating to an obsession
He is obsessional about keeping his desk tidy.
他对保持书桌整洁有强迫倾向。
强迫性的
Marked by obsession
His obsessional attention to detail made him a great editor.
他对细节的强迫性关注使他成为一位出色的编辑。
She couldn't stop checking the locks; it was an obsessional habit.
她忍不住反复检查门锁，这是一种强迫性的习惯。
He had an obsessional fear of germs and washed his hands constantly.
他对细菌有一种摆脱不了的恐惧，不停地洗手。
介词 about 后接事物或活动，表示“对……过分执着”。
He is obsessional about keeping his desk tidy.
他对保持书桌整洁有强迫倾向。
obsessional 常作定语修饰名词，如 thoughts、behavior、need。
She has an obsessional need for control.
她对控制有强迫性的需求。
系表结构中表示“变得强迫性的”，多含负面评价。
His concern for detail became obsessional.
他对细节的在意变得强迫性起来。
Not this
He has an obsessional with cleanliness.
Use this
He has an obsession with cleanliness.
obsessional 是形容词（或指“强迫症患者”的名词），不能表示“着迷、强迫念头”这种抽象事物；表达“对……的执念”要用名词 obsession，且常搭配 with。
Not this
He obsessional checks his phone.
Use this
He obsessively checks his phone.
checks 是动词，需要副词修饰；obsessional 是形容词，不能作状语，应改用副词 obsessively。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
强迫性思维
She couldn't escape her obsessional thoughts about the accident.
她无法摆脱关于事故的强迫性思维。
强迫行为
His obsessional behaviour made daily life difficult.
他的强迫行为使日常生活变得困难。
强迫性神经症
The doctor diagnosed him with obsessional neurosis.
医生诊断他患有强迫性神经症。
强迫症
Obsessional disorder can be treated with therapy.
强迫症可以通过心理治疗来治疗。
痴迷的爱
Her obsessional love for him bordered on unhealthy.
她对他的痴迷之爱近乎不健康。
病态嫉妒
Obsessional jealousy can destroy a relationship.
病态嫉妒会破坏一段关系。
Use obsessional naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：ob + session（会议）+ al，像脑中总在开一场停不下来的会议，反复纠缠，就是摆脱不了的执念。
语域：mixed 常见场景：clinical psychology、general written English obsessional 多用于心理学、医学或正式书面语，也可出现在一般书面表达中；日常口语通常用 obsessive。语域偏正式但不限于正式文本，介于中性和正式之间。
真正押韵的词有 confessional, professional, processional，重音元音为 /e/，结尾为 /ʃənəl/。拼写相似的形近词 optional, national, occasional 发音不同：optional 读 /ˈɒpʃənəl/，national 读 /ˈnæʃənəl/，occasional 读 /əˈkeɪʒənəl/（其中 s 发 /ʒ/），注意区分。
Dictionary facts from ECDICT, WIKTIONARY.