IPA: /wɛrˈɪn/
KK: /wɛrˈɪn/
In what way or respect something is done or exists.
The report explained the reasons wherein the project failed.
In what way or during which time something happens or is true.
The report explained wherein the company had failed to meet its goals.
Wherein is formed from "where" (from Old English "hwær", meaning at what place) and "in" (meaning within or inside). The word "wherein" refers to the place or situation in which something occurs or exists.
Think of 'where' as asking about a place and 'in' as indicating being inside — so 'wherein' helps you understand the specific place something is happening.