甥|おいoi[0]heiban (flat)

1. nounnephew
   私のおいは卵たまごに対たいしてアレルギー体質たいしつだ。↗

   My nephew is allergic to eggs.

• Related甥御おいごFormalFormal honorific for another person's nephew; 「甥」 is for one's own nephew or general, everyday use.
• Related甥御さんFormalHonorific that adds 「さん」 to 「甥御」, making it more colloquially polite; used for the other family's nephew.
• Antonym姪めいNeutralNeutral noun for a niece — a sibling's daughter — the direct counterpart of 「甥」.

Use 「甥」 for your own nephew. For someone else's nephew pick 「甥御さん」 or 「甥御」; 「甥御さん」 is the more conversational polite form. Use 「姪」 for a niece.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （おい）兄弟姉妹きょうだいしまいの息子むすこ。