illness, affliction.
"The surgeon carefully examined the broken mal to determine if surgery was necessary."
A longboard (type of surfboard).
A malleolus.
"He woke up with an awful mal on his shoulder that hurt when he moved."
A short form of given names such as Mallory, Malcolm etc.
"The teacher called on Mal to answer the question instead of his full name."
The word mal comes from the French language, where it originally meant "illness." It is a doublet of the Latin word malus.