/ skwɜːm; NAmE skwɜːrm/ verb
1.
to move around a lot making small twisting movements, because you are nervous, uncomfortable, etc.
SYN wriggle :
[ v , usually + adv. / prep. ]
The children were squirming restlessly in their seats.
[ v - adj ]
Someone grabbed him but he managed to squirm free.
2.
[ v ] to feel great embarrassment or shame :
It made him squirm to think how badly he'd messed up the interview.
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WORD ORIGIN
late 17th cent.: symbolic of writhing movement; probably associated with worm .