Something that quenches (thirst, fire, etc.)(noun)
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Use "quencher" in a sentence
"Try the thin-crust pizzas and the Top Heavy Hefeweizen, a great thirst quencher."
"The thyroid uses glutathione, a combination of three amino acids (glycine, glutamine, and cysteine), protectively as an antioxidant or free radical quencher and as a cofactor that makes it possible for one of its most important enzymes (5'-deiodinase) to work (6)."
"I had hoped to tell you about learning the word "désaltérant" (from my brother-in-law, who declared my home-brewed iced-tea a great thirst-quencher!), this, while lunching at our picnic table, where we chatted about sports (my being polite to him) and flowers (his being polite to me), and wine (our being polite to Jean-Marc)."