kindheartedness; kindly disposition
Refers to a person's innate or habitual kindness; often used to describe someone's character or a considerate act.
I'm always grateful for his kindheartedness.
I did it out of kindness.
Compound of 親切 (shinsetsu, 'kindness') and 気 (gi, 'spirit, disposition'). The exact historical derivation is uncertain, but the word is conventionally understood as 'kindheartedness'.