rough, to be Copy link Outline 1. horreo, ui, 2 (to bristle, as with hair)2. squāleo, 2 • rough, to be, become: 1. horreo, ui, 2 (to bristle, as with hair): to be r. with hair, capillis h., Hor. Epod. 5, 27: of the sea, Att. in Non. (horret quum mare fluctibus). Incept. to become r.: Ov.: Cic. 2. squāleo, 2: cf. rough (I. 13).