Where*form" (?), adv. [Where + from.] From which; from which or what
place. Tennyson.
Where*in" (?), adv.
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.