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Webster 1913 Edition

Adj.

[Pref.

in-

not +

exhausted

: cf. F.

inexhaustus

Not exhausted; not emptied; not spent; not having lost all strength or resources; unexhausted.

Dryden.

Adj.

[in and exhausted.]

Not exhausted; not emptied; unexhausted.

Not spent; not having lost all strength or resources; unexhausted.

inexhausted ‎(not comparable)

Not exhausted.
- (Can we date this quote?), John Dryden, The Poetical Works of John Dryden, Vol I:
  That all-forgiving king, / The type of Him above, / That inexhausted spring / Of clemency and love
- 1828, Thomas Gent, Poems (1828):
  The forms of polity, the springs of power, / Exploring still with inexhausted zeal