pucker

Noun

• an irregular fold in an otherwise even surface (as in cloth)

Verb

• become wrinkled or drawn together
  • her lips puckered
    

• draw together into folds or puckers

• to gather something into small wrinkles or folds
  • She puckered her lips
    

Related words

• Synonyms: 
  ruck , ruck up , gather , tuck , rumple , cockle , crumple , knit