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 cut, and the verb form of that is to cut.
When you think to cut something, what do you think about cutting? One thing is cutting down a tree, which is also known as 木, or き. You きる a き.
to hang up the phone
to cut down a tree
to turn off the switch
You cut mangos with a knife.
Did you cut that big tree with a chainsaw?
I cut my dog's fur, and now it looks like a cow.