malfunction
n.
1827, from mal- "bad, badly, wrong" + function. As a verb, by 1888. Related: Malfunctioned; malfunctioning.
〔李〕[mal-=bad 不良；function n.机能→] n. improper functioning；failure to work or perform 机能失常；失灵，故障
〔李〕[mal-=bad 不良；function n.机能→] n. improper functioning；failure to work or perform 机能失常；失灵，故障