exhaustverb(USE)
We try in vain to satisfy our exhaustless longing for knowledge.
She had an exhaustless fund of compassion for her fellow human beings.
His creativity is bold and exhaustless.
He spoke of the blind greed of those who claim the right to take for themselves the exhaustless resources of the earth.
The infinite is by definition limitless and exhaustless.

SMART Vocabulary: related words and phrases

Unlimited
blank cheque
bottomless
bottomless pit
bottomlessly
boundless
endless
illimitably
immeasurable
immeasurably
inestimable
inestimably
infinite
infinity
limitless
limitlessly
limitlessness
sky
the sky's the limitidiom
unbounded
unlimited