Compound Forms/Forme composte brother | brethren |
| baby brother n | (youngest male sibling) (informale: fratello minore) | fratellino nm |
| big brother n | informal (older male sibling) (informale) | fratellone nm |
| blood brother n | (biological male sibling) | fratello di sangue nm |
| | He's not my blood brother, just my step brother. |
| | Non è mio fratello di sangue, bensì il mio fratellastro. |
| blood brother n | figurative (loyal male friend) | fratello per patto di sangue nm |
| | They cut their palms and shook hands to become blood brothers. |
| | Si tagliarono i palmi delle mani e se le strinsero diventando fratelli per patto di sangue. |
bro, also UK: bruv n | informal, abbreviation (brother) (anche figurato per amico) | fratello nm |
| | (colloquiale, gergale: fratello, amico) | fra', frate nm |
| | I'm going to visit my baby bro at college this weekend. |
| brother and sister npl | (male and female siblings) | fratello e sorella nm |
| | You can tell they're brother and sister; in fact, they both look just like their mother. |
| | Si vede che sono fratello e sorella: assomigliano tutti e due alla madre. |
brother in arms, brother-in-arms n | (fellow soldier, comrade) | commilitone nm |
| | Many soldiers stay in contact with their brothers in arms long after the war is over. |
| | ⓘQuesta frase non è una traduzione della frase inglese. Ricordo sempre con affetto alcuni miei commilitoni. |
brother-in-arms, brother in arms n | figurative (ally) (figurato: alleato) | compagno d'armi nm |
| brother-in-law n | (spouse's male sibling) (fratello del partner) | cognato nm |
| | My wife and my brother-in-law have both inherited their mother's blue eyes. |
| | Mia moglie e mio cognato hanno ereditato entrambi gli occhi azzurri di loro madre. |
| brother-in-law n | (sibling's husband) (partner della sorella o fratello) | cognato nm |
| | My brother-in-law married my sister five years ago. |
| | Mio cognato ha sposato mia sorella cinque anni fa. |
| elder brother n | (older male sibling) | fratello maggiore nm |
| foster brother n | (brother temporarily adopted) | fratello affidato nm |
| | George is my foster brother; that's why he doesn't look like me or anyone else in the family. |
| fraternal twin brother n | (twin: non-identical, male) | gemello eterozigote nm |
| | She has a fraternal twin brother who lives in San Francisco. |
| | Ha un gemello eterozigote che vive a San Francisco. |
| fraternity brother n | US (member of all-male group) (college americano) | compagno di confraternita nm |
half brother (mainly US), half-brother (mainly UK) n | (male sibling by one parent) | fratellastro nm |
| | My half-brother and I have different fathers. |
| | Io e il mio fratellastro abbiamo padri diversi. |
| kid brother n | informal (younger male sibling) | fratellino, fratello minore, fratello piccolo nm |
| | He may be 22 now, but he'll always be my kid brother! |
| | Avrà anche 22 anni, ma resta sempre il mio fratellino. |
| lay brother n | (religion) | converso nm |
| | (di monastero) | fratello laico nm |
| little brother n | (younger male sibling) | fratello minore, fratello più piccolo nm |
| | I have one big sister and two little brothers. |
| | Ho una sorella maggiore e due fratelli minori. |
| Oh brother! interj | US, slang (expressing exasperation) (impazienza) | E basta!, Per la miseria! inter |
| soul brother n | US, slang (black man) | fratello nero nm |
| soul brother n | slang (close male friend) (figurato, colloquiale) | fratello nm |
stepbrother, step-brother n | (son of parent's spouse) | fratellastro nm |
| | Even though we look like we're related, Greg is actually my stepbrother. |
| | Anche se sembriamo parenti, Greg è in realtà il mio fratellastro. |
| twin brother n | (male sibling from same pregnancy) | gemello, fratello gemello nm |