咲 means (flower) to bloom and is a JLPT N2 kanji. It has 9 strokes and uses the mouth radical (口).
Stroke order · 9 strokes
On'yomi (音読み)
ショウ
Kun'yomi (訓読み)
さ(く)、
Radical
口 · mouth
Strokes
9
How to remember 咲
From the old meaning of the mouth (口) opening in laughter — a flower blooming is the tree's smile. 桜が咲く (cherry blossoms bloom) — Japan's most anticipated sentence.