sulphurize [ súlfy rīz ](3rd person present singularsulphurizes, present participlesulphurizing, past and past participlesulphurized) or sulphurise [ súlfy rīz ](3rd person present singularsulphurises, present participlesulphurising, past and past participlesulphurised) or sulfurize [ súlfy rīz ] or sulfurise [ súlfy rīz ]
transitive verb
Definition:
treat with sulphur: to treat or combine something with sulphur or a sulphur compound