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Webster 1913 Edition

Adj.

Illimitable.

Locke.

Adj.

Admitting no limits; boundless. [We now us illimitable.]

unlimitable ‎(comparative more unlimitable, superlative most unlimitable)

That cannot be limited; illimitable.
- 1646, Thomas Browne, Pseudodoxia Epidemica, I.7:
  In Morality, Rhetorick, Law and History, there is I confess a frequent and allowable use of testimony; and yet herein I perceive, it is not unlimitable, but admitteth many restrictions.