Ab in Semitic languages (such as Arabic and Hebrew) means "father". Just like your daddy is your father, ab is also used to refer to someone's father in these languages. It's a word that shows respect and honor towards someone who is seen as a figure of authority, protection, and guidance in the family. When you see a boy or girl calling their dad "ab" or saying "abbi" or "abu", they are calling out to their beloved father in a very special way. So, ab is an important word to know and use when talking about fathers in Semitic languages.