Synonyms of doubtfully

3 Syllables
askance, doubtingly, dubiously
4 Syllables
unsettingly, ambiguously, distrustfully, uncertainly, distrustingly, questioningly, suspiciously, questionably
5 Syllables
undecidedly, hesitatingly, unbelievingly, tentatively
6 Syllables
problematically, irresolutely