The Collaborative International Dictionary of English v.0.48:

Augment \Aug*ment"\, v. t. [imp. & p. p. Augmented; p. pr. &
   vb. n. Augmenting.] [L. augmentare, fr. augmentum an
   increase, fr. augere to increase; perh. akin to Gr. ?, ?, E.
   wax, v., and eke, v.: cf. F. augmenter.]
   1. To enlarge or increase in size, amount, or degree; to
      swell; to make bigger; as, to augment an army by
      re["e]forcements; rain augments a stream; impatience
      augments an evil.
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            But their spite still serves
            His glory to augment.                 --Milton.
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   2. (Gram.) To add an augment to.
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