unjustifiably

US /ʌnˌdʒʌs.təˈfaɪ.ə.bli/
UK /ʌnˌdʒʌs.təˈfaɪ.ə.bli/
1.

ingiustificatamente

in a way that cannot be accepted or defended as right:

:
•
The costs of advertising and administration are unjustifiably high.