경솔해요 · 경솔했어요 · 경솔한 (+noun)
rash, thoughtless, careless
Example
제가 너무 경솔하게 말해서 죄송합니다.
I'm sorry for speaking so thoughtlessly.
Word parts
경 light+솔 hasty
Literally 'light and hasty' — not weighing your words.
Good to know
Common in apologies: 제가 경솔했습니다 'I was thoughtless.'
Related words