pettishly
Adverb
Meaning
in a petulant manner
Source: WordNetSynonyms
irritably
petulantly
testily
disagreeably
grumpily
moodily
touchily
peevishly
bitterly
crossly
capriciously
cantankerously
sullenly
tetchily
grouchily
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Antonyms
Examples
he said testily: `Go away!'