Brother etymology

English

English word brother comes from Proto-Indo-European *bʰreh₂trós, and later Proto-Germanic *brōþēr (Brother.)

Detailed word origin of brother

Dictionary entry Language Definition
*bʰreh₂trós Proto-Indo-European (ine)
*brōþēr Proto-Germanic (gem-pro) Brother.
brōþor Old English (ang)
broþor Old English (ang) Brother.
brother Middle English (enm) Brother.
brother English (en) (transitive) To treat as a brother. Expressing exasperation. (African American Vernacular English) A black male.. A male fellow member of a religious community, church, trades union etc.. A male having at least one parent in common with another (see half-brother, stepbrother).. Someone who is a peer, whether male or female.. Son of the same parents as another person.