discontentedly
Adverb
Meaning
with discontent; in a discontented manner
Source: WordNetSynonyms
greedily
gloomily
grumpily
grudgingly
crossly
sullenly
grumblingly
displeasedly
lamentingly
despondingly
gripingly
Antonyms
Examples
he was still rumbling discontentedly when Pike returned bearing a folder of foolscap sheets