Therein vs. Thereon
Thereinadverb
(pronominal) in that; in him/her/it
Thereinadverb
In that or this place, time, or thing; in that particular or respect.
Thereinadverb
(formal) in or into that thing or place;
Thereonadverb
on that.
Thereonadverb
On that or this.
Thereonadverb
on that;
