expression, godan verb (-ru)
nod one's head; nod yes; agree
Literally 'to shake one's head vertically', i.e., to nod in agreement or affirmation. Often used in contrast with 首を横に振る (to shake one's head no).
彼は黙って首を縦に振った。
He silently nodded his head.
その提案に、全員が首を
Everyone nodded in agreement to the proposal.