婿 means son-in-law and is a JLPT N1 kanji. It has 12 strokes and uses the woman radical (女).
Stroke order · 12 strokes
On'yomi (音読み)
セイ
Kun'yomi (訓読み)
むこ
Radical
女 · woman
Strokes
12
How to remember 婿
A new person joining a woman's (女) household — a groom. 花婿 (groom); 婿養子 means an adopted son-in-law who marries into the family — in Japan even the surname can change!