/ ˈpʌkə(r); NAmE / verb
pucker (sth) (up) to form or to make sth form small folds or lines :
[ v ]
His face puckered , and he was ready to cry.
[ vn ]
She puckered her lips.
puckered fabric
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WORD ORIGIN
late 16th cent. (as a verb): probably frequentative, from the base of poke Scottish a bag or small sack and pocket (suggesting the formation of small purse-like gatherings).