To Climb
To Ascend
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 climb so the verb vocab version would be to climb (or to ascend), if that's the kind of thing you're into.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. This has the same reading as 上る which you learned all that time ago in Level 1. If you can remember that, you can remember this one!
木の上に登るのは楽しいです。
It's fun to climb on a tree.
山を登るときは、ジーパンをはかないで下さいね。
Do not wear jeans when climbing a mountain.
一生の内、少なくとも一度は富士山に登ることが夢なんです。
A dream of mine is to climb Mt. Fuji at least once in my lifetime.