ineptness

They are not only those identified by the prime minister, such as ineptness of the original police investigation.

Their "lameness" and "ineptness" and "impotence" plainly arose from disinclination alone.

"We've had infinites already—infinites," thought Oliver, and didn't care about the ludicrous ineptness of the words.

If these two noticed Angel's growing social ineptness, he noticed their growing mental limitations.

"Don't be too indifferent, Cora," said her mother, with ingenuous ineptness.

The inefficiency and ineptness of the Secretary of State have been a reproach to the country.