doubtful

dubitatif, sceptique

Qui n’est pas sûr qu’une chose soit vraie, possible ou une bonne idée.

En anglais simple : Not sure whether something is true, possible, or a good idea.

• She looked doubtful.
• I am doubtful about his plan.
• They remained doubtful that the repairs would last.

Comment l'utiliser : doubtful about/of something (He was doubtful about the chances of success.); doubtful that… (She was doubtful that they could finish on time.)

Synonymes : uncertain, unsure, sceptical

Contraires : confident, certain

Expressions courantes : doubtful about something, doubtful of something, remain doubtful

douteux

Qui a peu de chances d’être vrai ou digne de confiance.

En anglais simple : Not likely to be true or reliable.

• His explanation sounds doubtful.
• The report contains several doubtful claims.
• They relied on evidence of doubtful accuracy.

Synonymes : questionable, dubious

Contraires : credible

Expressions courantes : doubtful claim, doubtful evidence, doubtful accuracy