刈
ガイ, カイ, か.る, かっ, かり
reap, cut, clip, trim, prune
JLPT1 G7 S4 F1738
As per
乂
# (vegetation cut in swaths) +
刀
sword/knife → *cut/reap* with a sickle or other bladed implement → *trim*; *prune*.
[Full Kanji Etymology List]