adverbial
1. [ adjective ] of or relating to or functioning as an adverb
Examples:

"adverbial syntax"

Related terms: adverb
2. [ noun ] (grammar,linguistics) a word or group of words function as an adverb
Related terms: adverb
Similar spelling:   adverbially
  advertorial
  adverb
  adversely
  adversary
  advert
  advertizer
  advertiser
  adverse
  adversative