sulphurize
sulphurise
verb
(tr) to combine or treat with sulphur or a sulphur compound
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Examples from the Web for sulphurize
Historical Examples of sulphurize
Hiram was about to sulphurize the warehouse again but sat down instead, wet with perspiration.
The Yazoo MysteryIrving Craddock