inexhaustible

CEFR: C1-C2 /in-ex-haustible/ [ih2.n.ih0.g.z.ao1.s.t.ah0.b.ah0.l]

Definition: (Of an amount or supply of something) unable to be used up because existing in abundance

Example Sentences:

Their say-no-to-drugs mantra affirmed that New York at least has an inexhaustible supply of high energy.