carelessness

There is carelessness, but no mischief.

Carelessness is the cause of his failure.

There was a note of carelessness in the way she acted.

The error was due to carelessness pure and simple.

Lateness and carelessness are subjects for complaint.

a mistake that proceeded from carelessness;

A slight carelessness on this precipice could cost a man his life.

Carelessness in driving often results in disastrous accidents.

Alice's carelessness provoked her teacher to an outburst.

"You are supposed to get rid of carelessness, for it often leads to irretrievable errors."