"thirstiness" in the noun sense
1. aridity, aridness, thirstiness
a deficiency of moisture (especially when resulting from a permanent absence of rainfall)
2. thirst, thirstiness
a physiological need to drink
3. hunger, hungriness, thirst, thirstiness
strong desire for something (not food or drink
"a thirst for knowledge"
"hunger for affection"
Source: WordNet® (An amazing lexical database of English)
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