"a faulty functioning, a failure to function as expected," 1827, from mal- "bad, badly, wrong" + function. As a verb, "to fail to function normally or as expected," by 1888. Related: Malfunctioned; malfunctioning.
the coffee maker malfunctioned
malevolence
malevolent
malfeasance
malformation
malformed
malfunction
Mali
Malibu
malic
malice
malicious