noun, feminine/i.vʁɛ/plural: ivraies
ryegrass (Lolium); darnel, cockle (Lolium temulentum)
Synonyms: ray-grass, ivraie enivrante
From Late Latin ēbriāca (“drunken”) (the grains of the plant are slightly intoxicating), from Latin ēbrius, whence French ivre.