improbable
Concise Oxford English Dictionary © 2008 Oxford University Press:
improbable/ɪmˈprɒbəbl/
▶adjective not likely to be true or to happen.
■ unexpected and apparently inauthentic.
– derivatives
improbability noun (pl. improbabilities),
improbably adverb.
improbability noun (pl. improbabilities),
improbably adverb.
'improbable' also found in these Oxford entries:

