Pucker

Part of speech: noun (n.)

1. A fold; a wrinkle; a collection of folds.

2. A state of perplexity or anxiety; confusion; bother; agitation. [Prov. Eng. & Colloq. U. S.]

Part of speech: verb (v.)

To gather into small folds or wrinkles; to contract into ridges and furrows; to corrugate; -- often with up; as, to pucker up the mouth. "His skin [was] puckered up in wrinkles." Spectator.