dēop

dēop, adj: deep, extending downwards; describing the extreme of range (of understanding, thought, doctrine, oaths, etc.), profound, complete. (DAY-op / ˈdeːɔp)

Medieval manuscript illustration of a whale underwater gulping several fish into its mouth.
Bestiaire of Guillaume le Clerc; France, late 13th century; Bibliothèque Nationale de France, fr. 14964, f. 150v. [bestiary.ca]