smocking
US /ˈsmɑː.kɪŋ/
UK /ˈsmɑː.kɪŋ/

1.
smocking, sierplooien
a decorative needlework technique in which fabric is gathered into pleats and then stitched to create a textured, elastic surface, often used on children's clothing or blouses
:
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The baby's dress had delicate smocking on the bodice.
De babyjurk had delicate smocking op het lijfje.
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She learned how to do traditional English smocking.
Ze leerde hoe ze traditionele Engelse smocking moest doen.