mal·func·tion 
/ˌmælˈfʌŋkʃən/ verb
mal·func·tions; mal·func·tioned; mal·func·tion·ing /ˌmælˈfʌŋkʃən/ verb [no obj] : to fail to function or work properly
▪ A software problem is causing the system to malfunction.
▪ A software problem is causing the system to malfunction.
— malfunction noun, plural malfunctions
[noncount] ▪ The problem is causing malfunction of the system. [count] ▪ system malfunctions
[noncount] ▪ The problem is causing malfunction of the system. [count] ▪ system malfunctions
