What word does your mother always say?
colorless hydrocarbon, 1885, from Styrax, name of a genus of trees (the chemical is found in their resin), 1786, from Latin styrax, from Greek styrax, of Sem. origin (cf. Hebrew tsori "terebinth resin"). Form influenced by Greek styrax "shaft of a lance."
styrene sty·rene (stī'rēn')
A colorless oily liquid from which polystyrenes, plastics, and synthetic rubber are produced. Also called vinylbenzene.