ニイ兄

big brother, older brother

→ 二兄

noun Rare #40,518

big brother, older brother A familiar, affectionate way to address an older brother.

JA: ニイ兄、これ見て。

EN: Big brother, look at this.

ニイ兄菜穂子さんをどうする気なの？

Big brother, what are you going to do with Naoko?

— The Wind Rises (2013)

ニイ兄のバカ

Nii-nii is such an idiot.

— The Wind Rises (2013)

ニイ兄が思ってるより菜穂子さんの病気はずっと重いのよ

Nahoko's illness is much more serious than you think, big brother.

— The Wind Rises (2013)