grumblemulo signifas en angla

Esperanta	Angla
grumblemulo noun	crab [crabs](bad-tempered person) noun [UK: kræb] [US: ˈkræb]
grumblemulo, grumblulo noun	curmudgeon [curmudgeons](an ill-tempered stubborn person) noun [UK: kɜː.ˈmʌ.dʒən] [US: kər.ˈmə.dʒən]

Via historio