adverbial
Concise Oxford English Dictionary © 2008 Oxford University Press:
adverbial /adˈvɜːbiəl/ Grammar
▶noun a word or phrase functioning as a major clause constituent and typically expressing place (in the garden), time (in May), or manner (in a strange way). ▶adjective relating to or functioning as an adverb or adverbial.
– derivatives
adverbially adverb.
adverbially adverb.
'adverbial' also found in these Oxford entries:

