sibling rivalry

countable uncountable

Competition or animosity between siblings in one family.

Japanese Meaning

兄弟姉妹間での競争や敵対心、つまり家族内の兄弟姉妹間で生じる争いごとのこと

Their constant sibling rivalry made family gatherings tense.

兄弟姉妹間の対立が絶えず、家族の集まりは気まずかった。

Sense（1）

Competition or animosity between siblings in one family.

sibling rivalries

（ plural ）