Definition from Wiktionary, the free dictionary
adverbative (not comparable)
- (grammar) Functioning as an adverb; adverbial.
2002, Ross King et al., Continuing Korean, page 211:
- "Verbs have an adverbative form made by attaching -게 to the base."
Used principally in Korean and Indic linguistics, in order to distinguish a particular "adverbative" form from more general "adverbial" phenomena.