Where does “thereinto” come from?

thereinto (English) comes from English into, from Middle English in-to, from Old English intō, from Old English in, from Proto-West Germanic *in, from Proto-Germanic in, from Proto-Indo-European én — in.

thereinto (English): Into that place, state etc

Definitions

  1. Into that place, state etc

Ancestry of “thereinto”, step by step

thereinto traces back through two separate lines of ancestry.

via English into

StepLanguageWordMeaning
1EnglishintoTo or towards the inside of; To or towards the...
2Middle Englishin-tointo
3Old Englishintōinto
4Old Englishinin; Alternative form of inn
5Proto-West Germanic*in—
6Proto-Germanicinin; into
7Proto-Indo-Europeanénin

via English there

StepLanguageWordMeaning
1EnglishthereIn a place or location at some distance from the...
2Old Englishþærthere
3Proto-West Germanicþārthere
4Proto-Germanicþarthere, in that place
5Proto-Indo-Europeantar-there
6Proto-Indo-Europeanto-it; that; the, that
7Proto-Indo-Europeansóthis; that
Every word from Proto-Indo-European én →