gross misconduct meaning in English

特别严重的违反纪律
特别严重犯规
严重渎职

The company only dismisses its employees in cases of gross misconduct
公司仅在雇员严重失职的情形下才予以解雇
Talking in a whiny voice may be dementing but it is not gross misconduct
发出嘀嘀咕咕的声音可能令人抓狂，但这不是什么大错。
Failure or refusal to provide the certificate or providing false or inaccurate information will be deemed as a gross misconduct
若该员工无法或拒绝提供病假条或提供虚假信息，将被视为严重过失。
This termination reason is only applicable to member who has been dismissed by the employer because of fraud , dishonesty or gross misconduct against the employer
此离职原因只适用于如因欺诈、不诚实或行为粗鄙失当而遭雇主解雇之雇员。