Word
Kana: たしか Romaji: tashika Level: N4

確か

Meaning in English

certain, sure, if I remember correctly

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Sentence

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Dictionary

Word context

What it means

確か means something is true or certain, and it also serves to hedge a statement when recalling information. It describes reliability or truthfulness in a given claim and can be used before nouns or as part of fixed phrases to express certainty or memory-based hedging.

Main meanings

  • certain, sure, reliable in reference to information or facts
  • adverbial form 確かに meaning certainly or indeed
  • hedging use indicating memory or approximation in casual speech
  • before nouns, 確かな modifies nouns to express a definite quality

How to use it

Used as a na-adjective to describe nouns (確かな情報, 確かな証拠) and as an adverb in 確かに, to affirm or concede when recalling information; suitable for both casual and formal contexts, with nuances shifting toward memory-based hedging in everyday speech

Variants and close terms

  • 確かな (tashika na) — formal description of certainty
  • 確かに (tashika ni) — adverb meaning certainly or indeed
  • 確か (tashika) — stem used before other particles or in compounds
  • 不確か (futashika) — uncertain, doubtful (antonym)
  • 正確 (seikaku) — precise, accurate (related but more formal)

Composition

  • 確 = certainty, truth; か = kun-reading that forms the na-adjective; together they produce 確か with the core sense of certainty

Etymology

確 denotes certainty; か is the kun-reading that forms the adjective/adverbial usage, resulting in 確か as a na-adjective and its adverbial/hedging forms

Origin

Borrowed from the Chinese character 確, introduced into Japanese through the classical writing system; appears in classical Japanese texts and has evolved into contemporary usage as both a na-adjective and adverb

Word class

na-adjective (形容動詞) and adverb form as 確かに

Kanji

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