Shirabe
確かに

確かたしか

Common I-adj
English jmdict
1
adjectival nouns or quasi-adjectives (keiyodoshi) sure;certain;positive;definite
彼が間違っているのは確かです。
It is certain that he is wrong.
2
adjectival nouns or quasi-adjectives (keiyodoshi) reliable;trustworthy;safe;sound;firm;accurate;correct;exact
私はそのニュースを確かな筋から得た。
I got the news from a reliable source.
3
adverb (fukushi) If I'm not mistaken;If I remember correctly;If I remember rightly
これは確か淡水魚だと思います。
I believe this fish is a freshwater fish.
Other forms 確 【たしか】 (irregular okurigana usage) · 慥か 【たしか】 (rarely used kanji form)
English jmdict
1
adverb (fukushi) surely;certainly
確かに彼は信頼できます。
You can certainly rely on him.
Other forms 慥かに 【たしかに】 (rarely used kanji form)