7 letters · 7 points in Scrabble
noun latticework used to support climbing plants
verb train on a trellis, as of a vine
originFrom Middle English trelis, from Anglo-Norman treslis, from Old French treille (“arbor”), from Latin trichila (“arbor", "summer house”). However, see OED which claims another Old French form referring to sackcloth, from Vulgar Latin.
Etymology from Wiktionary, CC BY-SA 3.0