get used to, learn
狃 centers on becoming accustomed through repeated exposure: getting used to something or learning it by habit.
狃 combines 犭 (dog/beast) with 丑, which likely contributes the sound. The idea of a dog becoming accustomed to a routine may underlie the meaning, but the exact historical development is uncertain.
A dog (犭) beside the shape 丑, which looks like a twisted hand or a familiar object. Imagine a dog getting used to a new trick by repeating it until it becomes a habit.
For ジュウ, picture a dog getting used to chewing on a toy: chew -> ジュウ, and the dog learns the habit.