inexhaustible

Misollar

Books are inexhaustible sources of knowledge.
Your supply of anecdotes is inexhaustible.
The man is an inexhaustible source of energy.

sifat adjective

Impossible to exhaust; unlimited.

Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.