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.
のぼる
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!
この長くてきゅうなさかを登るのはかなりキツイっすね。
Going up this long, steep slope is really tough, eh?
コウイチは、さるのようにスイスイと木に登り、いともかんたんにバナナを取っておりてきました。
Koichi climbed up the tree as fast as a monkey and came down with bananas without breaking a sweat.
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.