نف بالانجليزي

to clear your nose by blowing strongly through it

نُفَّ أَنْفَكَ

Blow you nose

هَلْ عَلَّمْتِ الوَلَدَ كَيْفَ يَنُفُّ أَنْفَهُ؟

Did you teach the boy how to blow his nose?