What is the meaning of ?

the front

the past

previous

a portion, an amount

ago

makes place names that refer to the vicinity of a point of interest

the last, the previous

pre- (of an era)

ago

before

an honorific suffix added to a noun denoting a person

chữ Hán form of tiền (pre-, early (used to distinguish similarly named dynasties)).

Source: wiktionary.org