uncertain

US /ʌnˈsɝː.tən/

UK /ʌnˈsɝː.tən/

1.

not known or definite

:

•

The future of the project is uncertain.

•

It's uncertain whether he will accept the offer.

:

unknown unclear doubtful dubious unsettled

2.

feeling doubt about something; not sure

:

•

She was uncertain about her decision.

•

I'm uncertain if I locked the door.

:

doubtful hesitant unsure irresolute perplexed

:

in no uncertain terms