lascivious adj. + Add to list US //ɫəˈsɪviəs// UK //lɐsˈɪvɪəs// las·civ·i·ous SynonymsEtymology Synonyms lewdlibidinouslustfulOriginLATlascīviōsus→ENlascivious From Latin lascīviōsus, from lascīvia (“sportiveness, lustfulness”).