half-brother
🇺🇸
/ˈhæf brʌðər/
🇬🇧
/ˈhɑːf brʌðə(r)/
A male sibling who shares either the same mother or the same father, but not both.
John and his half-brother, Tom, have a strong bond despite not having the same mother.
ジョンと彼の異母兄弟であるトムは、同じ母親がいないにもかかわらず、強い絆で結ばれています。