noun
Physical thirst; the need or desire to drink. Often used in expressions like 渇きを癒す (to quench one's thirst).
のどが渇きを覚えた。
I felt thirsty.
冷たい水で渇きを癒した。
I quenched my thirst with cold water.
noun
Metaphorical thirst or hunger for something abstract, such as love, knowledge, power, or success. Often used with ～への渇き.
彼は知識への渇きが強い。
He has a strong thirst for knowledge.
成功への渇きが彼を駆り立てた。
A hunger for success drove him.