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Definition 2024

harm oneself as a result of trying to harm an adversary

Chinese:
Mandarin: 損人不利己 (zh), 损人不利己 (zh) ‎(sǔnrén bùlìjǐ)
Dutch: wie zijn neus schendt schendt zijn aangezicht
Finnish: sattua omaan nilkkaan
German: sich ins eigene Fleisch schneiden (de)
Romanian: (lit. to hit oneself in the head) a-și da singur în cap, (lit. to steal one's own cap) a-și fura singur căciula

Russian: вы́колю себе́ глаз, пусть у тёщи зять криво́й бу́дет ‎(výkolju sebé glaz, pustʹ u tjóšči zjatʹ krivój búdet) (lit.: I'll poke my own eye out, let my mother-in-law have a one-eyed son-in-law)
Spanish: tirar piedras contra el propio tejado (es), tirar piedras al propio tejado, tirar piedras sobre el propio tejado
Uzbek: burgaga achchiq qilib ko'rpa yoqish (lit. burn a blanket to spite bedbugs)