al-mufa'9alah

Today's word is a noun in Kuwaiti Arabic, but used as an adjective in English. 

So whereas you'd say 'my favourite brother' in English, you'd say: ukhu-ii al-mufa'9al in Kuwaiti.

Obviously 'favourite' changes its spelling according to whether the noun it's paired with is masculine or feminine. In the above example, the word 'brother' is clearly a masculine word. But how would you say my favourite sister?

Answer: ikhit-ii al-mufa'9alah.