Mowing
noun
Let's take the grass and prune it. This is called mowing.
The reading is 草 and 刈 put together into one. The か reading for 刈り comes from the kanji's reading.
昨日は俺が悪かったよ。本当にごめん。お詫びの印に、今日は草刈りをするよ。
I am really sorry for being a jerk yesterday. I’ll mow the grass today to apologize.