IMPROBABLE a.
unlikely to be true; not to be expected under the circumstances or in the usual course of events; as, an improbable story or event. He . . . sent to Elutherius, then bishop of Rome, an improbable letter, as some of the contents discover. Milton. -- Im*prob"a*ble*ness, n. -- Im*prob"a*bly, adv.
INCIDENTAL a.
Happening, as an occasional event, without regularity; coming without design; casual; accidental; hence, not of prime concern; subordinate; collateral; as, an incidental conversation; an incidental occurrence; incidental expenses. By some, religious duties . . . appear to be regarded . . . as an incidental business. Ro…