sulfur (n.)

also sulphur, c. 1300, from Anglo-French sulfere, Old French soufre "sulfur, fire and brimstone, hellfire" (13c.), later also sulphur, from Late Latin sulfur, from Latin sulphur, probably from a root meaning "to burn." Ousted native brimstone and cognate Old English swefl, German schwefel, Swedish swafel, Dutch zwavel. The spelling with -ph- is standard in Britain, but its suggestion of a Greek origin is misleading.

updated on December 28, 2013

Definitions of sulfur from WordNet
sulfur (v.)
treat with sulphur in order to preserve;
Synonyms: sulphur
sulfur (n.)
an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions);
Synonyms: s / sulphur / atomic number "
Etymologies are not definitions. From, not affiliated with etymonline.