past belief (adjective) unbelievable: beyond the imagination
Sinonime: absurdity, amenity, dissipation, exaggeration, excess, exorbitance, expenditure, extravagancy, folly, frill, icing on the cake, immoderation, improvidence, lavishness, luxury, outrageousness, overdoing, overindulgence, overspending, preposterousness, prodigality, profuseness, profusion, recklessness, squander, squandering, superfluity, unreasonableness, unrestraint, unthrift, waste, wastefulness, wildness
Antonime: believable,
credible,
plausible,
real