I’ve came across the word “wherein”, and I’m doubtful about how different it is from using just plain “where”. For example in this sentence:
There is a case, though, wherein you can use the aforementioned property.
Is there any difference in meaning if I use “where”?
Answer
Wherein means “in which place, situation or thing; in what way.” It is a formal word that is almost equivalent to where.
an organization wherein each employee is valued and respected
an organization where each employee is valued and respected
Attribution
Source : Link , Question Author : Nicolás , Answer Author : apaderno