IPA: /dɪˈsʌlfər/
KK: /dɪˈsʌlfər/
To remove sulfur from a substance, like oil or gases, to make it cleaner or safer.
The factory uses a process to desulfur the exhaust gases before releasing them into the air.
Past: desulfurized
Past Participle: desulfurized
Desulfur is formed from "de-" (meaning down from or away) and "sulfur" (from Latin "sulfur", meaning sulfur). The word describes the process of removing sulfur from a substance.
Think of 'removing' ('de-') 'sulfur' from something — that's what desulfur means.