grievously Copy link Outline 1. grăvĭtĕr2. valdē, vĕhĕmenter3. ăcerbē4. atrōcĭter • grievously: 1. grăvĭtĕr: to complain g., g. queri, Cic.: to be g. ill, g. aegrotare, id.: v. seriously. 2. valdē, vĕhĕmenter: v. greatly. 3. ăcerbē: v. bitterly. 4. atrōcĭter: v. fiercely. Phr.: to be g. mistaken, valde errare, falli, etc.: v. greatly.