periwinkle (n.1)

evergreen plant, c. 1500, diminutive of parvink (12c.), from Old English perwince, from Late Latin pervinca "periwinkle" (4c.), from Latin, perhaps from pervincire "to entwine, bind," from per "thoroughly" (see per) + vincire "to bind, fetter" (see wind (v.1)).

periwinkle (n.2)

kind of sea snail, 1520s, apparently an alteration of Old English pinewincle (probably by influence of Middle English parvink; see periwinkle (n.1)); from Old English pine-, which probably is from Latin pina "mussel," from Greek pine. The second element is wincel "corner; spiral shell," from Proto-Germanic *winkil-, from PIE root *weng- "to bend, curve" (see wink (v.)).

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