From Wiktionary, the free dictionary
Inherited from Old French frerastre.
- IPA(key): /fʁɛ.ʁatʁ/ ~ /fʁɛ.ʁɑtʁ/ ~ /fʁe.ʁatʁ/ ~ /fʁe.ʁɑtʁ/
frèrâtre m (plural frèrâtres, feminine sœurâtre)
- (dated) stepbrother (especially an evil one)
- Synonyms: frarâtre, quasi-frère
- (by extension) bad or uncaring brother