To Prune, To Mow, To Cut
transitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means prune and the verb vocab version is to prune (or to mow or to cut).
かる
The reading is the same as the reading you learned with the kanji.
草を刈り終わったから、放してやってよ。
I’ve finished mowing the grass, so turn him loose.