Wikipedia
Makruh
In Islamic terminology, something which is makruh ( Arabic: مكروه, transliterated: makrooh or makrūh) is a disliked or offensive act (literally "detestable" or "abominable"), one of the five categories (or " Ahkam pentad") in Islamic law -- wajib/ fard (obligatory), Mustahabb/mandub (recommended), halal/ mubah (permitted), makruh (disapproved), haram (forbidden). Though it is not haram (forbidden) or subject to punishment, a person who abstains from this act will be rewarded. Muslims are encouraged to avoid such actions when or as possible. It is one of the degrees of approval ( ahkam) in Islamic law.