assumption
as.sump.tion \*-'s*m(p)-sh*n\ n [ME, fr. LL assumption-, assumptio, fr. L, taking up, fr. assump]tus, pp. of assumere 1a: the taking up of a person into heaven cap 1b: the church feast commemorating the Assumption of the Virgin Mary that is observed on August 15 2: a taking to or upon oneself 3: the act of laying claim to or taking possession of 4: ARROGANCE, PRETENSION 5a: the supposition that something is true 5b: a fact or statement taken for granted 6: the taking over of debts of another
Webster's English Dictionary