Where does “brotherfucking” come from?

brotherfucking (English) comes from English Fucking, from English -ing, from Old English -ing, from Old English -tūn, from Old English tūn, from Proto-West Germanic tūn, from Proto-Germanic tūną, from Gaulish dunum — smoke; mist, haze.

brotherfucking (English): Having sex with one's brother; Synonym of...

Definitions

  1. Having sex with one's brother; Synonym of...

Ancestry of “brotherfucking”, step by step

brotherfucking traces back through two separate lines of ancestry.

via English Fucking

StepLanguageWordMeaning
1EnglishFuckingAn act of sexual intercourse, especially one lacking passion or a feeling of sincere love
2English-ingUsed to form gerunds, a type of verbal nouns,...
3Old English-ingForming nouns from verbs, indicating action,...
4Old English-tūnhomestead, village, town
5Old Englishtūnenclosure, yard; place; dwelling
6Proto-West Germanictūnfence
7Proto-Germanictūnąfence; enclosure
8Gaulishdunumfort; hill, hillfort
9Proto-Celticdūnomstronghold, rampart
10Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English brother

StepLanguageWordMeaning
1EnglishbrotherSon of the same parents as another person; A male...
2Middle EnglishbrotherA brother or brother-in-law; a male sibling
3Old Englishbrōþorbrother
4Proto-West Germanicbrōþerbrother
5Proto-Germanicbrōþērbrother
6Proto-Indo-Europeanbʰréh₂tērbrother
Every word from Proto-Indo-European dʰewh₂-Every word from Proto-Celtic dūnomEvery word from English -ing