What is the meaning of Mal-?

bad, badly

evil

unhealthy, harmful

unpleasant

incorrect

incomplete, unfinished

poorly, deficiently

unintentional, mistaken, accidental

not

poorly, badly

denotes opposites

badly; wrongly

denotes the opposite of the unprefixed form

bad; badly

definite form of ma’ used before vowels or qamri consonants.

bad; badly

bad; badly

poorly

barely, hardly

bad; badly

Source: wiktionary.org