pleach
To unite by interweaving, as (horticulture) branches of shrubs, trees, etc., to create a hedge; to interlock, to plash.
transitive
Her Vine, the merry chearer of the heart, / Vnpruned, dyes: her Hedges euen pleach'd, / Like Priſoners wildly ouer-growne with hayre, / Put forth diſorder'd Twigs: [...]
Where it comes from
The 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 participle of plectō (“to braid, plait, weave; to bend, turn, twist”). The noun is derived from the verb.
Adapted from the Wiktionary entry pleach (CC BY-SA 4.0).