Missharpen

It is our opinion that this missharpening and thus consequent misuse would be the basic and primary source of the failure.

Source: wiktionary

Curbow credibly testified that a production line supervisor brought one bad cutter to Curbow complaining about how it was sharpened; Curbow thereafter checked the toolcrib and found three others similarly missharpened.

Source: wiktionary

If you have missharpened an instrument in this manner, you will notice that it does not engage calculus readily; instead , there is a tendency to slip over deposits.

Source: wiktionary

I no longer have to worry about the possibility of the bits being missharpened or poorly swaged.

Source: wiktionary