Etymology
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thirst (n.)

Old English þurst, from Proto-Germanic *thurstu- (source also of Old Saxon thurst, Frisian torst, Dutch dorst, Old High German and German durst), from Proto-Germanic verbal stem *thurs- (source also of Gothic thaursjan, Old English thyrre), from PIE root *ters- "to dry." Figurative sense of "vehement desire" is attested from c. 1200.

thirst (v.)

Old English þyrstan "to thirst, thirst after," from the noun (see thirst (n.)); the figurative sense of the verb was present in Old English. Compare Old Saxon thurstian, Dutch dorsten, Old High German dursten, German dürsten, all verbs from nouns. Related: Thirsted; thirsting.

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Definitions of thirst
1
thirst (v.)
feel the need to drink;
thirst (v.)
have a craving, appetite, or great desire for;
Synonyms: crave / hunger / starve / lust
2
thirst (n.)
a physiological need to drink;
Synonyms: thirstiness
thirst (n.)
strong desire for something (not food or drink);
a thirst for knowledge
Synonyms: hunger / hungriness / thirstiness
From wordnet.princeton.edu