a. [UN-1 7 b.] Incapable of being improved.
1806. Ann. Rev., IV. 82. The country is not only bad but unbetterable.
1874. Ruskin, Fors Clav., xl. IV. 76. A lovely, classic, unbetterable sentence of Marmontel’s, perfect in wisdom and modesty.
1923. Saintsbury, Hist. Eng. Prosody, XI. i. 344. I shall not say that this is unbetterable: I set no limits to the powers of the Muse.
