adverb, adverb taking the 'to' particle
Describes a total, often sudden change or disappearance, similar to すっかり. Used with verbs like 忘れる, 変わる, 消える.
彼のことはけろりと忘れてしまった。
I completely forgot about him.
風邪がけろりと治った。
My cold has completely gone.
adverb, adverb taking the 'to' particle
nonchalantly; as if nothing happened
Describes acting calm or indifferent after something that would normally cause a reaction, often with している or と. Related to けろっと.
See also: けろっと
叱られてもけろりとしている。
Even when scolded, he acts as if nothing happened.
彼女は失敗してもけろりと笑った。
She laughed nonchalantly even after making a mistake.
Mimetic word; the exact origin is uncertain, but it is likely related to the sound-symbolic element けろ, which suggests lightness or indifference.