裏切り|うらぎりuragiri[0]heiban (flat)

1. nountreachery; betrayal; perfidy
   あの男おとこは裏切うらぎりもしかねない。↗

   He is capable of treachery.

• Synonym背信はいしんWrittenWritten and legal in flavor: violating trust or good faith, as in 「背信罪」; it stresses the breaking of trust rather than betrayal in general.
• Synonym裏切り行為うらぎりこういNeutralNeutral phrase for a concrete act of betrayal, at home in speech and writing; it puts more weight on the act itself than 「裏切り」 does.
• Synonym背信行為はいしんこういWrittenWritten phrase for a breach of trust, at home in legal and business contexts, as in 「背信行為に当たる」; more formal than 「裏切り行為」.
• Related反逆はんぎゃくWrittenWritten word for defying a ruler or those in power, as in 「反逆者」; the focus is rebellion against authority, not personal betrayal.
• Related謀反むほんWrittenWritten word for a vassal rising in revolt against his lord, as in 「謀反を起こす」; it leans toward historical contexts.
• Related寝返りねがえりNeutralNeutral word for rolling over in bed or, figuratively, defecting to the enemy's side; the image is switching allegiance, not betrayal at large.
• Related不義ふぎWrittenWritten word for morally wrongful conduct—unrighteousness or illicit love such as adultery; the stress is on violating ethics.
• Related内応ないおうWrittenWritten, often historical word for secretly siding with the enemy from within—acting as an inside agent; narrower than 「裏切り」.
• Related内通ないつうWrittenWritten and fairly rare: secretly communicating with the enemy, or carrying on a secret affair; it covers both treasonous contact and adultery.
• Antonym忠義ちゅうぎWrittenWritten antonym with a feudal flavor: devoted loyalty to one's lord; the direct opposite of 「裏切り」.
• Antonym忠誠ちゅうせいWrittenWritten antonym: loyalty and allegiance, as in 「忠誠を誓う」; the standard opposite of betrayal.
• Antonym信義しんぎWrittenWritten antonym: good faith and keeping one's word, as in 「信義を守る」; it pairs with 「背信」 as its opposite.

Use 「裏切り」 for betraying friends or companions, as in 「仲間の裏切り」. For a written, legal breach of trust pick 「背信」; for the concrete act, 「裏切り行為」; for rebellion, 「反逆」 or 「謀反」; for switching sides, 「寝返り」. Antonyms: 「忠誠」 for loyalty, 「信義」 for good faith.

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

1. 裏切うらぎること。