Synonyms of unsatisfying

1 Syllable
lame
2 Syllables
failing, bitter
3 Syllables
displeasing, inferior, mediocre, unpleasant, frustrating, unhappy, depressing
4 Syllables
disappointing, distasteful, disconcerting, disagreeable, insufficient, unfulfilling, discouraging, disheartening
5 Syllables
uninteresting, inadequate, ineffective
6 Syllables
dissatisfactory