1. (a.) Not dubious or doubtful; certain.

2. (a.) Not doubting; unsuspecting.

absolutely admittedly assumably assured believing beyond doubt beyond question by all odds certain certainly confident convinced definitely devout dogmatic dollars to doughnuts doubtlessly faithful fideistic for certain for sure impressed with in all likelihood in all probability incontestably indisputably indubious indubitably irrefragably irrefutably like enough likely make no mistake most likely naturally no doubt out of question past dispute persuaded pietistic pious pistic positive positively presumably presumptively probably questionless satisfied secure sold on supposedly sure surely ten to one truly unchallenged uncontested uncontradicted uncontroversial uncontroverted undeniably under the impression undisputed undoubted undoubtedly undoubtful undoubting unequivocally unquestionably unquestioned very like very likely without doubt