improbable

C'est improbable.

It's unlikely.

Ça semble improbable.

That looks unlikely.

Cela semble improbable.

This seems unlikely.

C'est hautement improbable.

That's highly unlikely.

Cela semble très improbable.

That seems highly unlikely.

Je pense que c'est hautement improbable.

I think that's highly unlikely.

C'est très improbable.

That's very unlikely.

Ma réussite est improbable.

There is little prospect of my success.

Ce scénario est improbable.

That scenario is unlikely.

C'est possible, mais improbable.

It's possible, but unlikely.

Je suis tombé amoureux dans un endroit improbable.

I fell in love in an unlikely place.

Lorsque l'on a éliminé l'impossible, tout ce qui reste, quoiqu'improbable, doit être la vérité.

When you have eliminated the impossible, whatever remains, however improbable, must be the truth.