JMdict: 1596930

確か 【たしか】

  1. [adj-na,n] sure; certain; positive; definite
  2. [adj-na,n] reliable; trustworthy; safe; sound; firm; accurate; correct; exact
  3. [adv] If I'm not mistaken; If I remember correctly; If I remember rightly
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
Assurance, Firm, Tight, Hard, Solid, Confirm, Clear, Evident カク, コウ たし.か, たし.かめる

Words often seen with this one: (experimental feature)

この (287), こと (249), はず (177),  (149),  (123), その (112),  (106),  (102),  (92),  (91), あれ (91), それは (87), それ (86), そう (82), 名前 (81), お前 (81), いい (78), 先生 (78), あなた (76), まで (74), いる (71),  (68), ちょっと (67), ような (65), オレ (63)