nonexcusably

Example:His nonexcusably tardiness caused a lot of friction in the team.

Definition:In an unredeemed, unexcused, and unjustified manner; in a way that is not excusable or justifiable.

Example:Her nonexcusably rude behavior during the meeting was shocking.

Definition:In a way that is not to be pardoned.

Example:His nonexcusably careless mistake led to a serious accident.

Definition:In a way that is unforgivable or unjustifiable.

Example:The nonexcusably unfair treatment of employees was brought to the human resources department.

Definition:In an unforgivable manner.

Example:His nonexcusably late submission to the project means a severe penalty.

Definition:In a fashion that is not to be accepted or tolerated.