First opened Thursday, May 20, 2010
確か
たしか
- head-high (atamadaka): falls after mora 1
How to read it: a line over a kana means the voice is high there, and ↓ marks where it drops. A kana with no line is low. With no ↓ the pitch stays high to the end and does not drop even on a following particle (が, は).
if I remember correctly; certain, definite
Tashika derives from the tashi- element in たしに (tashi ni, “sufficiently; firmly; surely”) plus the suffix か (-ka).
Taken apart
No breakdown is shown for this word: Wiktionary's text for it doesn't give a split that spells the word and joins to its reading, and any other split would be a guess.
Written with 確
In a sentence
気は確かか。
Are you crazy?
それは確かかい。
Can I take your word for it?
Sentences are from Tatoeba (CC BY 2.0 FR), picked by fixed rules from a dated export and shown unchanged. Nobody has reviewed them one by one.
What Wiktionary says
Quoted line by line from Wiktionary's Etymology section for this reading, taken from one dated dump so it can't change underneath us. Nothing below is paraphrased.
- “From Old Japanese. First attested in the Nihon Shoki of 720 CE.”
- “Derived from the tashi- element seen in たしに (tashi ni, “sufficiently; firmly; surely”) and たしない (tashinai, “difficult, agonizing; poor, lacking”) + adjective-forming suffix か (-ka).”
Source: Wiktionary: 確か (dump of 2026-09-02), available under CC BY-SA 4.0. Reading, meaning and part of speech from JMdict, and kanji readings from KANJIDIC2 (EDRDG).
What the labels mean
- 和語 Native Japanese
- Words that were already Japanese before Chinese vocabulary arrived — usually written with kun'yomi and often short.
- Derivation
- A word built from a stem plus a suffix or prefix.