What are the Arabic words for allowed and forbidden?

Answer 1

There are a number of words in Arabic for these concepts.

If you are looking for the Islamic religious terms for allowed things and prohibited things, which are Arabic words since most Islamic religious terms come from Arabic, the words are halaal (حلال) - allowed and haraam (حرام) - forbidden.

In common usage, e.g. you are writing a sign that says "Three year old children are forbidden from going to the pool" or "You are allowed to buy these candies", the words halaal and haraam are almost never used. The word for forbidden is usually mana3 (منع) or its derivative mamnua3 (ممنوع). For allowed, you have the two dominant words masmuah (مسموح) and momken (ممكن).