grumpily
🇺🇸
/ˈɡrʌmpɪli/
🇬🇧
/ˈɡrʌmpɪli/
in a bad-tempered or irritable manner
He grumpily muttered under his breath as he trudged up the stairs.
彼は階段を上りながら不機嫌にブツブツ言った。