Meaning

verb form or weave into a braid or braids

verb interlace the shoots of

originThe verb is from Late Middle English pleshe, Middle English plechen, pleche (“to layer; to propagate (a plant) by layering, to pleach”), possibly from Anglo-Norman and Middle French plesser, plessier, Middle French plescer, variants of Middle French, Old French plaissier, plessier (“to plash”), from Late Latin *plaxus, from Latin plexus (“braided, plaited, woven; bent, twisted”), perfect passive…

Etymology from Wiktionary, CC BY-SA 3.0