GRUMPY is validvalid

ill-tempered [adj GRUMPIER, GRUMPIEST] : GRUMPILY [adv], GRUMPINESS [n]

21,154 of 196,601 in NWL2023·also valid in CSW24

bad-tempered [adj GRUMPIER, GRUMPIEST, GRUMPILY] / a bad-tempered person [n GRUMPIES]