Wherein — Defs

01 adv. In which; in which place, thing, time, respect, or the like; -- used relatively.

1.
In which; in which place, thing, time, respect, or the like; -- used relatively.
“Her clothes wherein she was clad.” — Chaucer.

“There are times wherein a man ought to be cautious as well as innocent.” — Swift.
2.
In what; -- used interrogatively.
“Yet ye say, Wherein have we wearied him!” — Mal. ii. 17.