To Mow
To Reap, To Harvest
If you prune and take from what you pruned, you're going to mow or to reap or to harvest whatever it is you're pruning.
かりとる
The reading is the reading you learned with 刈 and the reading from the vocab 取る.
私の実家は農家で米を育てているので、今週末は稲の刈り取りを手伝わなきゃいけないんです。
My parents are farmers who raise rice so I have to help them harvest rice this weekend.