SULKY is validvalid

sullenly aloof or withdrawn [adj SULKIER, SULKIEST] : SULKILY [adv], SULKINESS [n] / a light horse-drawn vehicle [n SULKIES]

13,380 of 196,601 in NWL2023·also valid in CSW24

in a resentful mood [adj SULKIER, SULKIEST, SULKILY] / a kind of horse-drawn vehicle [n SULKIES]