確たしか

た

し

か

Common wordJLPTN4Freq.FrequencyTop 1,000

Meanings

Expresses subjective certainty or conviction about a fact or situation. Often used in the form 確かな + noun or 確かに + verb.

Describes a person, information, or method that can be trusted or relied upon. Often used with nouns like 情報, 筋, 方法.

if I remember correctly; if I'm not mistaken

Adverbial use, often at the beginning of a sentence, to express a recollection that the speaker is not 100% sure about. Commonly used as 確か〜.

確たしかな〈物もの〉reliable/trustworthy ~ (e.g. information, method)
確たしかな情じょう報ほうを手てに入いれた。
I obtained reliable information.
確たしかに〈事こと〉to affirm that something is indeed true
確たしかに彼かれはそう言いった。
He did indeed say that.
確たしか〈事こと〉だったと思おもうif I remember correctly, ~ was the case
確たしか彼かれは昨日きのう休やすみだったと思おもう。
If I remember correctly, he was off yesterday.
〈人ひと〉の腕うでは確たしかだsomeone's skill is reliable/proven
この職しょく人にんの腕うでは確たしかだ。
This craftsman's skill is dependable.

確かく実じつN3sense 1
確実 is objective and fact-based, often used for probabilities and outcomes, while 確か expresses the speaker's own subjective conviction.
正せい確かくN3sense 2
正確 emphasizes exactness and precision (e.g. of numbers or measurements), while 確か emphasizes general reliability or certainty.
明めい確かくN3sense 1
明確 stresses that something is clearly and unambiguously stated, whereas 確か simply conveys that the speaker feels sure of it.
定さだか
確か is common and used both affirmatively and negatively, while 定か is almost always used with negative forms like 定かでない.

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確かく
確か is the common everyday word for 'certain/sure', while 確 is a rare literary bound form used mainly in fixed phrases like 確たる.
間ま違ちがいない
確か suggests the speaker is fairly confident but allows some room for doubt, while 間違いない expresses near-total certainty.
紛まぎれもない
確か expresses personal certainty or reliability, whereas 紛れもない stresses that a fact is objectively undeniable.

不ふ確たしかN1sense 1
不確か means uncertain or unreliable, the direct opposite of 確か's sense of being sure or trustworthy.
疑うたがわしいN2
確か describes something certain or reliable, the opposite of 疑わしい's sense of doubt or unreliability.
怪あやしいN3
確か describes something certain or reliable, the opposite of 怪しい used to mean doubtful or uncertain.
あやふやN1
確か means certain or sure, contrasting with あやふや's sense of being uncertain or unreliable.

確たしかにN3
確か is a na-adjective meaning 'certain' or 'reliable' (as in 確かな情報), while 確かに is its adverbial form meaning 'surely' or 'certainly'.

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確たしかUsage66%
Standard kanji spelling; high-frequency word.
たしかUsage33%
Kana spelling is common in casual writing and when the adverbial sense is used.
慥たしかUsage<1%
rarely-used kanji form
Rarely used kanji form.
確たしかUsage<1%
irregular okurigana
Irregular okurigana usage; rarely seen.

Derived from the verb 確かめる (to confirm). The adverbial sense developed from the adjectival use.