noun which may take the genitive case particle 'no'
Describes a person whose fundamental nature is twisted, mean-spirited, or morally crooked. Often used as a strong character judgment. Related to the phrase 根性が曲がる.
See also: 根性が曲がる (こんじょうがまがる)
That warped boss always takes pleasure in his subordinates' mistakes.
彼は根性曲がりだから、素直に謝ることができない。
He's so perverse that he can't apologize honestly.
Also means a perverse or contrary person, but 根性曲がり carries a stronger moral condemnation, implying a fundamentally bad nature.
Compound of 根性 (こんじょう, 'disposition, spirit') and 曲がり (まがり, 'bend, twist'), from the verb 曲がる (まがる, 'to bend'). Literally 'bent disposition'.