unspeakably
adverb /ʌnˈspiːkəbli/
/ʌnˈspiːkəbli/
(literary, usually disapproving)- in a way that cannot be described in words, usually because it is so bad synonym indescribably
- The man was an unspeakably awful human being: a monster.
Oxford Collocations DictionaryUnspeakably is used with these adjectives:- cruel