Due to the loss of power, it is improbable that we will begin on time.
Not probable; unlikely to be true; not to be expected under the circumstances or in the usual course of events; as, an improbable story or event
If you describe something as improbable, you mean it is strange, unusual, or ridiculous. On the face of it, their marriage seems an improbable alliance. = unlikely + improbably im·prob·ably The sea is an improbably pale turquoise
not likely to be true or to occur or to have occurred; "legislation on the question is highly unlikely"; "an improbable event"
too improbable to admit of belief; "a tall story" not likely to be true or to occur or to have occurred; "legislation on the question is highly unlikely"; "an improbable event" having a probability to low to inspire belief
Something that is improbable is unlikely to be true or to happen. a highly improbable coincidence = unlikely probable, likely + improbability improbabilities im·prob·abil·ity the improbability of such an outcome