unwarranted
definition
not justified or authorized
example
The manager's unwarranted criticism of the team members demotivated everyone and created a negative atmosphere.
synonyms
unjustifiedunwelcomeunmerited
word origin — The word 'unwarranted' comes from the prefix 'un-' meaning 'not' and 'warranted,' which is the past participle of 'warrant,' derived from the Old French 'garanir,' meaning 'to guarantee or ensure.'