malo
bad
mal-
bad, evil
Malo means bad and can be remembered by its similarity to the English prefix mal-0, which means bad or evil0 (as in 'malevolent' or 'malicious').
adjective
  1. bad
    Not good in quality, character, or effect
    El tiempo es malo hoy, está lloviendo mucho. // The weather is bad today, it's raining a lot.