/ ˌɔːgˈmentətɪv; NAmE / adjective
( linguistics ) ( of an affix or a word using an affix ) increasing a quality expressed in the original word, especially by meaning 'a large one of its kind'
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WORD ORIGIN
late Middle English (in the sense having a tendency to increase ): from Old French augmentatif , -ive or medieval Latin augmentativus , from the verb augmentare , from Latin augere to increase.