per-grăvis, e, adj.,
very weighty or grave , very important (class.): pergravia (haec), opp. levia, Ter. Hec. 292: testes, Cic. Cael. 26, 63: oratio, id. Sest. 50, 107.— Adv.: pergrăvĭter , very gravely , very seriously (class.): pergraviter offensus, Cic. Att. 1, 10, 2: reprehendere aliquem, id. de Or. 1, 53, 227.