"Age" in Engpsh is pronounced as [eɪdʒ].
It comes from the Old Engpsh "ǣr" which means "a space of time", later evolving to mean "the length of time that a person has pved or a thing has existed".
Example sentences:
What is your age?
你多大了？
She is in her early thirties.
她三十几岁。
The building is over a hundred years old.
这座建筑物已经有一百多年历史了。
Note: In Engpsh, when asking someone's age, it is usually more popte to ask "How old are you?" instead of "What is your age?"