indelible (adjective) indelible: not able to be erased, indestructible
Sinonime: acid,
acrid,
acrimonious,
awkward, bad-tempered,
blunt,
brusque, captious, choleric,
churlish, cranky*, cross, crotchety, crusty,
cynical,
difficult, dour, fretful,
gloomy,
glum, grouchy,
harsh, huffy, ill-humored, ill-tempered, irascible, irritable,
misanthropic, morose, nasty-tempered, peevish, perverse, petulant, prickly, saturnine, snappish, snappy, sour, splenetic, sulky,
sullen,
surly,
tart, testy,
tough,
trying, unsociable
Antonime: happy