brothers
词形变化：
同义词：
comrade | associate | colleague | chum | member | crony | sib | kin | sibling | relative | kinsman | relation | confrere | mate | fellow | affiliate | peer | yokemate | compeer | blood brother | yokefellow | partner | friend | co-worker | helpmate | companion | ally | monk | parallel | identical twin | twin | identical | brother | blood | buddy | pal | sidekick |
反义词：
sister |