To Become
intransitive 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 become so the vocab verb version would be to become.
While the kanji version is worth knowing, be aware that you'll usually see this verb written in hiragana.
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: You are starting to become something else. You're transforming, but you're not sure what it is. First, you get fins... uh oh, something in the water. Then, you gain a tail and rubbery skin... hmm, something sea mammal-like. Oh, and then a huge horn flies out of your nose. You are going to become a narwhal (な).
必要に成る
to become necessary
六十才に成る
to turn sixty years old
お世話に成る
to be much obliged to someone, to be indebted to someone
早く大人に成りたいな。
I want to become an adult soon.
おたまじゃくしがカエルに成るって知ってた？
Did you know that tadpoles become frogs?
彼は、数百人から成るチームのリーダーです。
He is a leader of a team that has become several hundred of people.