Meaning

noun an ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent

originEtymology tree Middle Persian *bōragbor. Arabic بَوْرَق (bawraq)der. Medieval Latin boraxder. Anglo-Norman boreisbor. Middle English boras English borax From Middle English boras, from Anglo-Norman boreis, from Medieval Latin borax, baurach (“borax”), from Arabic بَوْرَق (bawraq), from Middle Persian bwlk' (bōrag), which yielded Persian بوره (bure).

Etymology from Wiktionary, CC BY-SA 3.0