nod
UK: nɒd | US: nɑːd
v. to lower and raise one's head slightly and briefly, often as a gesture of agreement, greeting, or acknowledgment
n. a small, quick downward and upward movement of the head
The word "nod" traces back to Old English hnodian, meaning "to bow the head slightly." It is likely of imitative origin, reflecting the natural motion of a quick head movement. The simplicity of the word mirrors its universal, instinctive gesture across cultures. Unlike compound words, "nod" remains monomorphic, preserving its compact Germanic roots without prefix/suffix divisions.
She gave a polite nod to the stranger.
The professor nodded in approval during the lecture.
He nodded off during the boring meeting.
A single nod can convey understanding without words.
The baby nodded while falling asleep in her arms.