unlikely
US /ʌnˈlaɪ.kli/
UK /ʌnˈlaɪ.kli/

1.
improbable, poco probable
not likely to happen, be true, or be successful
:
•
It's unlikely that he will arrive on time.
Es improbable que llegue a tiempo.
•
An unlikely candidate won the election.
Un candidato improbable ganó las elecciones.