sum-mōrōsus (subm-), a, um, adj.,
somewhat peerish or morose : me illa valde movent stomachosa et quasi summorosa ridicula, Cic. de Or. 2, 69, 279.
sub-mōrōsus (summ-) adj., somewhat peevish, rather morose: quasi submorosa ridicula. ...
An Elementary Latin Dictionary