"puckering" in the verb sense
1. pucker, rumple, cockle, crumple, knit
to gather something into small wrinkles or folds
"She puckered her lips"
2. gather, pucker, tuck
draw together into folds or puckers
3. pucker, ruck, ruck up
become wrinkled or drawn together
"her lips puckered"
Source: WordNet® (An amazing lexical database of English)
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