ふとした

ふ

と

し

た

Freq.FrequencyTop 50,000

Meanings

pre-noun adjectival

impulsive; on a whim; casual; unexpected; accidental

Describes a sudden, unplanned, or chance action, thought, or occurrence. Often used with nouns like こと, 瞬間, きっかけ, 一言, and 出来事. The nuance ranges from a spontaneous whim to an inadvertent or unexpected event.

ふとしたことで昔むかしの友

Related words

突とつ然ぜん
突然 is an adverb/adjective meaning 'suddenly' or 'abrupt', often for dramatic or unexpected events. ふとした is a pre-noun adjectival that modifies nouns to express a casual, impulsive, or chance quality, and is less about abruptness and more about the unplanned nature of the moment.
偶ぐう然ぜん
偶然 is a noun/adverb meaning 'coincidence' or 'by chance', emphasizing the lack of intention or predictability. ふとした is similar but is used attributively before nouns and often carries a nuance of a fleeting, impulsive thought or minor chance occurrence.

Etymology

The exact derivation is uncertain. It appears to be a fixed pre-noun form related to the adverb ふと (suddenly, unexpectedly), with the addition of した (past tense of する), but it is not used as a regular verb. The combination likely fossilized into a rentaishi.