非行|ひこうhikou[0]heiban (flat)

1. no-adjectivedelinquency; misconduct
   学校がっこうをさぼるのは非行ひこうの第だい一いち段階だんかいである。↗

   Cutting school is the first stage of delinquency.

• Synonym悪事あくじNeutralEvil deeds or crimes, as in 「悪事を働く」; applies at any age, while 「非行」 is mostly said of young people.
• Synonym不行跡ふぎょうせきWrittenWritten word for misconduct in one's private life — dissolute, improper behavior. 「非行」 today chiefly means delinquency by young people.
• Related不始末ふしまつNeutralNeutral word for careless handling that causes trouble for others, as in 「火の不始末」. 「非行」 is immoral or unlawful behavior, not mismanagement.
• Related不埒ふらちWrittenWritten word describing lawless, outrageous behavior, often used in scolding, as 「不埒な輩」. 「非行」 is an objective label for delinquent acts.
• Related悪行あくぎょうWrittenEvil deeds or wrongdoing in a broad sense, with no age limit. 「非行」 mostly covers young people violating laws or social norms.
• Related醜行しゅうこうWrittenWritten word for shameful, disgraceful acts, often scandals. 「非行」 refers to delinquent behavior by the young.
• Related心得違いこころえちがいNeutralDoing wrong through a mistaken understanding; milder in tone, with a note of admonition. 「非行」 is behavior society condemns as delinquent.
• Related汚行おこうWrittenRare written word for shameful acts one dreads having exposed. Say 「悪事」 or 「悪行」 instead, and 「非行」 for young offenders.
• Antonym善行ぜんこうNeutralAntonym: good deeds or charitable acts, as in 「善行を積む」.
• Antonym模範的行動WrittenAntonym: exemplary conduct worthy of imitation, the opposite of the delinquent behavior 「非行」 describes.

Use 「非行」 for delinquency by young people — breaking laws or social norms. For wrongdoing in general pick 「悪事」 or 「悪行」; for trouble caused by mishandling, 「不始末」; for shameful, scandalous acts, 「醜行」. The others are rarer or narrower in use.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 道義どうぎに外はずれた良よくない行おこない。
2. 青少年せいしょうねんの法律ほうりつ・社会しゃかい規範きはんなどに背そむく行為こうい。