Caliph (or khalifa) literally means

A caliph is a religious and civil leader in a Muslim country. ... Caliph comes from the Arabic word khalafa, meaning "successor" or "next in line." It was taken as a title by Abu-bekr, the first Islamic leader after the death of Mohammed, the prophet who founded the religion of Islam.

a governess was mean to her.

explanation:

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )