Simple past tense and past participle of quench.(verb)
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Use "quenched" in a sentence
"Sudden thirst that cannot be quenched is a major symptom of diabetes type 1, so one must get straight to the doctor or hospital with a urine sample if this happens."
"And so, around midday on September 19, 2008, the connection "quenched" - which means a super-conducting cable suddenly lost its super-conductivity, turning into an ordinarily conductive wire that couldn't take the 11,000 amps of electricity."
"Indeed, Dr. Harmon laid the groundwork for the whole antioxidant industry when he demonstrated that free radicals are "quenched" by antioxidants."