To Make Sure Of
To Verify, To Confirm
transitive verb, ichidan verb
Like with 確か, which means certain, this is the verb version of that. So when you "do certain" you are going to make sure of something or you're going to verify something.
This one is kun'yomi followed by okurigana. If you remember the reading you learned with 確かに, you should know this one!
ちゃんとドアにカギをかけたかどうか確かめた方がいいですよ。
You should make sure the door is properly locked.
アルコール分がちゃんと飛んだかどうか、確かめてくださいね。
Verify that the alcohol content has been completely removed.
いつも、カナエさんが単語の使い方に間違いが無いか、辞書で確かめてくれています。
Kanae always checks the dictionary to make sure there are no mistakes in word use.