Akademik

malfunction
Disordered, inadequate, or abnormal function.

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mal·func·tion (')mal-'fəŋ(k)-shən vi to function imperfectly or badly: fail to operate in the normal or usual manner <\malfunctioning kidneys>
malfunction n

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mal·func·tion (mal-funkґshən) dysfunction.

Medical dictionary. 2011.