unjustifiably

adverb
UK /ʌnˈdʒʌstɪfaɪəbli/
US /ʌnˈdʒʌstəfaɪəbli/

In a way that cannot be shown to be fair or right.

The teacher unjustifiably blamed the whole class for the mess.


OTHER MEANINGS

2. In a way that has no good excuse or explanation.

He was unjustifiably angry at his little sister.

3. Without enough proof or evidence to support it.

The company unjustifiably raised the prices overnight.

4. In a manner that treats someone unfairly.

She felt unjustifiably left out of the game.