Where does “beswear” come from?

beswear (English) comes from English Be, from Middle English be, from Old English bēo, from Proto-Germanic biumi, from Proto-Germanic *beuną, from Proto-Indo-European bʰew- — to grow, swell; to swell, wax, grow; to blow; to...

beswear (English): To swear by; swear about or regarding; swear at...

Definitions

  1. To swear by; swear about or regarding; swear at...

Ancestry of “beswear”, step by step

beswear traces back through two separate lines of ancestry.

via English Be

StepLanguageWordMeaning
1EnglishBeAs an auxiliary verb
2Middle EnglishbeAlternative form of been; Alternative form of...
3Old EnglishbēoI become, I will be, I am; bee
4Proto-Germanicbiumifirst-person singular present active indicative...
5Proto-Germanic*beuną
6Proto-Indo-Europeanbʰew-to grow, swell; to swell, wax, grow; to blow; to...

via English swear

StepLanguageWordMeaning
1EnglishswearTo take an oath, to promise; To use offensive,...
2Middle EnglishswareAlternative form of square; A response to a query...
3Old Englishswaruan oath, vow
4Proto-Germanicswarōa solemn statement or affirmation; oath; vow
5Proto-Indo-Europeanswer-to ache; to fester; wound; injury
Every word from Proto-Indo-European bʰew-Every word from Proto-Germanic *beunąEvery word from Proto-Germanic biumi