curmudgeon
Concise Oxford English Dictionary © 2008 Oxford University Press:
curmudgeon /kəːˈmʌdʒ(ə)n/
▶noun a bad-tempered or surly person.
– derivatives
curmudgeonliness noun,
curmudgeonly adjective.
curmudgeonliness noun,
curmudgeonly adjective.
– origin C16: of unknown origin.
'curmudgeon' also found in these Oxford entries:

