Where does “thereacross” come from?

thereacross (English) comes from English there, from Old English þær, from Proto-West Germanic þār, from Proto-Germanic þar, from Proto-Indo-European tar-, from Proto-Indo-European to-, from Proto-Indo-European só — this; that.

thereacross (English): Across that

Definitions

  1. Across that

Ancestry of “thereacross”, step by step

thereacross traces back through two separate lines of ancestry.

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

via English across

StepLanguageWordMeaning
1EnglishacrossTo, toward, or from the far side of; On the...
2Middle EnglishacrosIn the shape of a cross
3Anglo-Normanan croiz—
Every word from Proto-Indo-European só →Every word from Proto-Indo-European to- →Every word from Proto-Indo-European tar- →