確か

• 読み: たしか
• ローマ字: tashika
• 漢字の分解: 確 (kaku/tashi) — certain, sure, reliable
• 発音: /ta.ɕi.ka/

意味

If I remember correctly; I think; certain; definite; reliable.

Functions as both a na-adjective meaning certain/reliable (確かな情報, reliable information) and as an adverb meaning if I recall correctly (確か明日だったと思う, I think it was tomorrow). The adverbial use is extremely common in everyday conversation when recalling uncertain information. Pairs well with と思う.

例文

1. 確か、この店は六時に閉まると思います。
2. 確かな情報がないと判断できません。
3. 確か彼女は大阪の出身だったはずです。

使い方ガイド

場面: recollection, uncertainty, verification

トーン: tentative

起源と歴史

The kanji 確 combines 石 (ishi, stone) with 隺 (kaku, a crane/bird). Stone represents solidity and certainty — something as firm and reliable as rock.

文化的背景

時代: Classical

世代: All ages

社会的背景: Universal