per-dĭus — Lewis & Short
per-dĭus, a, um, adj.dies,
I all day long, the livelong day (post-class.):
stare solitus Socrates dicitur, pertinaci statu perdius atque pernox,Gell. 2, 1, 1; App. M. 5, p. 161, 11; 9, p. 219, 23.