'Surlily' definitions:

Definition of 'surlily'

adverb

In a churlish manner; "the store owner treated his customers churlishly" [syn: churlishly, surlily]

From: GCIDE

Surlily \Sur"li*ly\ (s[^u]r"l[i^]*l[y^]), adv. In a surly manner. [1913 Webster]