Third-person singular simple present indicative form of extinguish.(verb)
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Use "extinguishes" in a sentence
"Finally, the accelerants responsible for the burnout that extinguishes so many teaching careers -- lacking of planning time, too heavy a workload, and problematic student behavior -- would be abated by the efforts of other conscripts."
"Connie extinguishes the cigarette in his nearly empty bottle, sets it down on the coffee table, and retrieves a fresh one from the crate."
"The fruit of their visit was "The All-Searing Eyes," the lead story in Action Comics #558 (cover-dated August 1984), in which Superman extinguishes the fire raging beneath Coaltown."