to wriggle or writhe.

to feel or display discomfort or distress, as from reproof, embarrassment, pain, etc.

He squirmed under the judge's questioning.

the act of squirming; a squirming or wriggling movement.

verb

sit still

verb

agonize , flounder , shift , skew , squiggle , toss , twist , wind , worm , wriggle , writhe , waggle , turn , contort , fidget , wiggle