deviant

Compared meaning: not normal or usual (adjective).

比较义项：不正常的，异于寻常的（形容词）。

• irregular

  Irregular describes something that lacks a consistent pattern or rhythm, most often physical processes, shapes, or schedules; it is neutral and does not by itself suggest danger or wrongdoing.

  irregular 描述缺乏规律或节奏的事物，最常用于生理过程、形状或时间安排；语气中性，本身并不暗示危险或错误。

  Her pulse was irregular, speeding up and slowing down with no clear pattern.

  她的脉搏不规则，忽快忽慢，没有明显的规律。

• abnormal

  Abnormal marks a measurable departure from what is typical or expected, especially in medical or scientific contexts, and signals that the deviation is worth investigating.

  abnormal 指偏离典型或预期水平、可被测量的差异，尤其用于医学或科学语境，暗示这种偏差值得进一步调查。

  Blood tests revealed abnormal levels of the hormone, prompting further investigation.

  血液检测显示该激素水平不正常，促使医生进一步检查。

• unnatural

  Unnatural suggests something goes against nature or normal human feeling, often sounding strange, forced, or artificial rather than simply statistically unusual.

  unnatural 暗示某事违反自然规律或正常的人之常情，常给人奇怪、做作或不真实的感觉，而不只是统计意义上的异常。

  Her cheerful reaction to the tragic news seemed strangely unnatural.

  她对这个悲惨消息表现出的欢快反应显得异常不自然。

• deviant 本词

  Deviant judges behavior, especially social or moral conduct, as violating accepted norms, carrying a stronger and more disapproving tone than the other three words.

  deviant 用于评判行为，尤指社会或道德层面的举止违反了公认的准则，语气比其他三个词更强烈、更带贬义。

  The school counselor addressed the student's increasingly deviant behavior.

  学校辅导员就该学生日益反常的行为进行了谈话。

Irregular, abnormal, unnatural, and deviant all mean not normal. Irregular is neutral, just lacking a steady pattern. Abnormal means outside the normal range, often in medical contexts. Unnatural means against nature, sounding strange or artificial. Deviant means breaking social norms, the strongest and most disapproving.

这几个词都表示“不正常”，但侧重点和语气不同：irregular 强调缺乏规律或秩序，语气中性；abnormal 强调偏离正常范围，常用于医学或统计语境，带有值得关注的意味；unnatural 强调违反自然规律，常含奇怪、造作或缺乏人情味的负面意味；deviant 强调偏离社会认可的行为准则，语气最强，常带道德评判色彩。