Etymology
1. PIE word
2. *bʰréh₂tēr
3. Etymology tree
4. Proto-Indo-European *bʰréh₂tēr
5. Proto-Germanic *brōþēr
6. Proto-West Germanic *brōþer
7. Old English brōþor
8. Middle English brother
9. English brother
10. Inherited from Middle English broder, brodir, brother, brothir, broþer, broðer, from Old English brōþor, brōþur, brōðer, brōður, from Proto-West Germanic *brōþer, from Proto-Germanic *brōþēr (“brother”), from Proto-Indo-European *bʰréh₂tēr (“brother”). Doublet of bhai, bru, frater, friar, pal, and vai.
11. Cognates
12. Cognate with Scots breeder, bridder, brither, broder, brother, bruther (“brother”), Yola brover, brower (“brother”), North Frisian brouder, bruler, Bröđer (“brother”), Saterland Frisian Brour, Brúur (“brother”), West Frisian broer (“brother”), Alemannic German briöder, bruder, brueder, bröder, Brüeder, Brüädär (“brother”), Bavarian pruadar, prueder, pruider (“brother”), Central Franconian Broder (“brother”), Cimbrian pruadar, pruudar (“brother”), Dutch broeder, broer (“brother”), German Bruder (“brother”), German Low German Broor (“brother”), Limburgish broor, Broër (“brother”), Luxembourgish Brudder (“brother; monk”), Mòcheno pruader (“brother”), Vilamovian brüder (“brother”), Yiddish ברודער (bruder, “brother”), Danish, Norwegian Bokmål, Norwegian Nynorsk, and Swedish broder, bror (“brother”), Elfdalian bruoðer (“brother”), Faroese and Icelandic bróðir (“brother”), Crimean Gothic bruder (“brother”), Gothic 𐌱𐍂𐍉𐌸𐌰𐍂 (brōþar, “brother”); also Breton breur (“brother”), Cornish broder (“brother”), Irish bráthair (“brother”), Manx braar (“brother; friar, monk”), Scottish Gaelic bràthair (“brother”), Welsh brawd (“brother”), Latin frāter (“brother; sibling”), Ancient Greek βρά (brá, “brother”), φρᾱ́τηρ (phrā́tēr, “brother, citizen, clansman, kinsman”), Phrygian βρατερε (bratere, “brother”), Lydian 𐤡𐤭𐤠𐤱𐤭𐤳𐤦𐤳 (prafršiš, “brother”), Latgalian bruoļs (“brother”), Latvian brālis (“brother”), Lithuanian brólis (“brother”), Old Prussian brāti, brote (“brother”), Belarusian, Bulgarian, Macedonian, Russian, and Ukrainian брат (brat, “brother”), Czech bratr (“brother”), Polish, Slovak, and Slovene brat (“brother”), Serbo-Croatian бра̏т, brȁt (“brother; buddy, mate”), Armenian ապեր (aper), ախպար (axpar), ախպեր (axper), եղբայր (eġbayr, “brother; buddy”), Baluchi برات (barát, “brother”), Central Kurdish and Southern Kurdish برا (bra, “brother”), Northern Kurdish bira (“as a brother”), Ossetian ӕрвад (ærvad), ӕрвадӕ (ærvadæ, “brother”), Pashto ورور (wror, “brother”), Persian برادر (barādar, birādar / barâdar), برار (birār / berâr), وردار (vardâr, “brother; comrade; dude”), Ashkun břa (“younger brother”), Kamkata-viri břo (“brother”), Tregami brā (“brother”), Waigali brā, břā (“brother”), Tocharian A pracar (“brother”), Tocharian B procer (“brother”), Sanskrit भ्रातृ (bhrātṛ, “brother; friend”). See: Cornish '
broder'.