不確(ふたし)か

ふたしか
na-adjective
uncertain, unreliable, vague
descriptive
1. uncertain, unreliable, vague, unclear
Not definite, dependable, or clear. Used for memories, information, footing, or anything that lacks certainty or stability.
記憶(きおく)が不確(ふたし)かだ。
My memory is uncertain.
不確(ふたし)かな情報(じょうほう)を信(しん)じてはいけない。
You shouldn't believe unreliable information.
足元(あしもと)が不確(ふたし)かなので、手(て)すりにつかまって歩(ある)いた。
My footing was unsteady, so I walked holding onto the handrail.

Forms

不(ふ) (not) + 確(たし)か (certain, definite). The antonym is 確(たし)か (certain).

Usage

Describes anything that lacks certainty — memories, information, foundations, or futures. Often used when hedging or admitting a lack of confidence in what one is saying.

Common collocations

Related Words

Antonym: 確(たし)か
Compare: 不確定(ふかくてい) (uncertain)
general
Added 2026.2.16 10:06 · Revised 2026.9.2 13:01
11000/11362_futashika