expression, godan verb (-su)
quench one's thirst; wet one's whistle
A set phrase meaning to drink something and relieve thirst. Often used literally, but can be figurative for satisfying a desire.
冷たい水で喉を潤した。
I quenched my thirst with cold water.
ビールで喉を潤そう。
Let's wet our whistles with some beer.
Standard kanji-kana mixed spelling.
Kana spelling for 喉; common in everyday writing.
喉が渇く means 'to become thirsty', while 喉を潤す is the action of relieving that thirst.
Composed of 喉 (throat) + を (object marker) + 潤す (to moisten). The phrase literally means 'to moisten one's throat'.