Blitheness

Example:His carelessness led to the company’s biggest ever loss.

Definition:The quality of being careless, often in a way that neglects responsibilities or duties

Example:She treated his complaints with a cavalier attitude, as if they were unworthy of her attention.

Definition:A person who regards important matters with disrespect or as trivial

Example:There is a hardening of the attitude among certain groups toward irresponsibility.

Definition:The quality of being untroubled by a sense of moral or social responsibility

Example:Her views on the subject were just airiness, without any real substance to back them up.

Definition:The quality of being light and insubstantial; easily communicated and not taken seriously