noun, masculine/eɾmaˈnastɾo/plural: hermanastros
stepbrother (stepsister for the feminine form), stepsibling (gender neutral term); half brother (half sister for the feminine form)
Synonyms: medio hermano
Etymology tree Proto-Indo-European *ǵenh₁- Proto-Indo-European *-mn̥ Proto-Indo-European *ǵénh₁mn̥ Proto-Italic *genamen Latin *genmen Latin germen Latin germānus Old Spanish ermano Spanish hermano Latin -aster Spanish -astro Spanish hermanastro From hermano + -astro.