unjustifiable - definition and synonyms

adjective 

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/ʌnˈdʒʌstɪˌfaɪəb(ə)l/
  1. not right or sensible for any reason

    Our military presence there is unjustifiable.

    The new law represents an unjustifiable intrusion into the privacy of the individual.

derived word

unjustifiably

adverb