確実 (かくじつ) Japanese meaning

確実 (かくじつ) Japanese meaning | Kotomora

Kanji

確たしかN4
確か is more subjective, often meaning 'I believe' or 'if I recall correctly', while 確実 expresses objective, evidence-based certainty.
明めい確かくN3
明確 emphasizes clarity and lack of ambiguity, while 確実 emphasizes reliability and the absence of doubt about an outcome.
間ま違ちがいない
間違いない is a casual, conversational way to say 'no mistake about it', while 確実 is the more formal, written-register word for certainty.
鉄てっ板ぱん
確実 is a formal adjective meaning 'certain/reliable', while 鉄板 is a casual noun used for something guaranteed to succeed.

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確かく
確実 is the standard modern word for 'certain, reliable' and can stand alone freely, whereas 確 cannot be used independently outside set expressions.
手て堅がたい
確実 stresses certainty that something will happen as expected, whereas 手堅い stresses avoiding failure through careful, low-risk choices.

不ふ確かく実じつ
不確実 simply negates 確実, describing something uncertain or unreliable rather than firmly established.
不ふ確たしかN1
確実 means 'certain, sure' in a more formal or objective sense, contrasting with 不確か's lack of certainty.

確かく信しんN1
確信 is a noun meaning a person's firm personal conviction, whereas 確実 describes the objective certainty of a fact or outcome.
確かく認にんN4
確認 is a verb-forming noun meaning 'to confirm/check', while 確実 is an adjective describing something as already certain, not an act of checking.
確かっ固こ
確固 describes an unwavering attitude or belief, while 確実 describes the certainty or reliability of a fact, plan, or outcome.

Compound of 確 (certain, firm) and 実 (truth, reality). The combination conveys the idea of something being solidly true or dependable.