sleepless Copy link Outline 1. insomnis2. exsomnis3. dēsomnis4. insomniōsus (of one who is habitually s.)5. pervĭgil (thoroughly watchful) • sleepless: 1. insomnis: a s. night, nox i., Virg. Aen. 9, 167: Tac. (see No. 5): 2. exsomnis: Virg. Aen. 6, 556: Vell.: Hor. Od. 3, 25, 9 (Orell.). 3. dēsomnis: Petr. 47, 5. 4. insomniōsus (of one who is habitually s.): Cat. R. R. 157, 8. 5. pervĭgil (thoroughly watchful): a s. night, p. nox, Just. 12, 13: Tac. A. 1, 65 expressly distinguishes it from insomnis; "insomnes magis quam pervigiles": whilst Plin. Pan. 63 joins p. et insomnis: vĭgil denotes watchful, alert. Phr.: to pass a s. night, vigilare de nocte, Cic. Q. Fr. 2, 15 (13), 2: so evigilare, pervigilare: v. awake.