mal-
Concise Oxford English Dictionary © 2008 Oxford University Press:
mal-/mal/
▶combining form
- 1 in an unpleasant degree: malodorous.
- 2 in a faulty or inadequate manner: malfunction.
■ in an improper manner: malpractice.
- 3 not: maladroit.
– origin from Fr. mal, from L. male ‘badly’.
'mal-' also found in these Oxford entries:

