Very false friends

Wikipedia article on false friends.

In Hebrew, the word עני (ʿani) means poor.

(The spelling is ʿayin-nun-yud.)

In Arabic, the word غني (ghani) means rich.

(The spelling is ghayin-nun-ya. ʿayin and ghayin merged in Hebrew a few millenia ago; they're both represented by ʿayin in Hebrew. This means that the root of the two words is essentially the same.)