exhaustless
In this poem, one meaning seems to branch out of another almost exhaustlessly.
The world appeared to her to be a fountain of joy from which she drew exhaustlessly.
The area was thought to be exhaustlessly rich in mineral wealth.

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