English-Spanish translations for doubtful

• dudoso
  Esto último es dudoso, por no decir más. That itself is doubtful, to say the least.
  Que se lleve a cabo es más bien dudoso. Whether anything will actually be done is doubtful.
  Sin embargo, es muy dudoso que esto sea aconsejable. It is highly doubtful whether that is advisable, however.
• dubitativo
  Lo que ha sucedido durante el largo debate que hemos mantenido, es que el Parlamento se mostró un poco más dubitativo que la Comisión acerca de la eficacia de este sistema. What happened during the long debate we have had on this, is that Parliament was a little more doubtful than the Commission about the efficacy of this system.
• sospechoso

Definition of doubtful

• Subject to, or causing doubt
• Undecided or of uncertain outcome
• Improbable or unlikely
• Unclear or unreliable
• A doubtful person or thing

Related words

• doubtfulness
• doubtfully
• undoubtful
• doubtful case