The Knight's Tour problem is a famous mathematical chess puzzle. The first solution provided an Arab philosopher in the 9th century from present-day Iraq.
The term Semitic Language was invented by a German scholar in 1781: August Ludwig von Schlözer.
Reading grammar books in Arabic can be challenging if you cannot decode the language of the grammarians (i'rab/إعراب). But there is a formula.
The Arabic term Kāfir (Kafir - كافر) is probably the most controversial word in Islam. It is the opposite of believer – in Arabic: Mu’min / مؤمن.
Taghut/Taghout طاغُوت is an Arabic term that is specifically used to denounce everything that is worshiped instead or besides Allah.