Webster’s Revised Unabridged Dictionary · 1913
Augmentative
Aug·ment′a·tive (a̤g·mĕnt′ȧ·tĭv), a. [Cf. F. augmentatif.] Having the quality or power of augmenting; expressing augmentation. — Aug·ment′a·tive·ly, adv.
Aug·ment′a·tive, n. (Gram.) A word which expresses with augmented force the idea or the properties of the term from which it is derived; as, dullard, one very dull. Opposed to diminutive. Gibbs.