The Collaborative International Dictionary
Excuseless
Excuseless \Ex*cuse"less\, a.
Having no excuse; not admitting of excuse or apology.
--Whillock.
Wiktionary
excuseless
a. Having no excuse; not admitting of excuse or apology.
Usage examples of "excuseless".
A point-blank excuseless refusal was, while possible, a senseless course.