To Use
To Spend
transitive verb, godan verb
This word consists of kanji with hiragana attached. Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means use so the verb version is to use. If you're talking about money, this can also mean to spend.
つかう
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you:
Two cars (つか), are what you have to use because you're so huge you don't fit into one. You've got a British car on your left and an American car on your right, and you're driving them both at the same time.
友だちのじしょを使いたいです。
I want to use my friend’s dictionary.
いたいのはとても苦手なので、ますいを使ってください。
I'm not good with pain, so please use anesthetics.
そんなに屁っ放り腰にならないで！知ってる日本語をできるだけ使うようにしなよ。
Don’t be afraid of that. You should use the Japanese you know as much as possible.