Meaning

noun a deficiency of moisture (especially when resulting from a permanent absence of rainfall)

noun a physiological need to drink

noun strong desire for something (not food or drink)

originEtymology tree English thirsty Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English thirstiness From thirsty + -ness.

Etymology from Wiktionary, CC BY-SA 3.0