Wriggle

Part of speech: verb (v.)

To move the body to and fro with short, writhing motions, like a worm; to squirm; to twist uneasily or quickly about. Both he and successors would often wriggle in their seats, as long as the cushion lasted. Swift.

Part of speech: verb (v.)

To move with short, quick contortions; to move by twisting and squirming; like a worm. Covetousness will wriggle itself out at a small hole. Fuller. Wriggling his body to recover His seat, and cast his right leg over. Hudibras.

Part of speech: adjective (a.)

Wriggling; frisky; pliant; flexible. [Obs.] "Their wriggle tails." Spenser.