(adv.) Certainly; indubitably.

OK Roger absolutely actually all right alright alrighty amen and no mistake as you say at all events at any rate aye by all means certainly clearly da decidedly decisively definitely demonstrably distinctly exactly fine for a certainty for a fact for certain for real for sure forsooth good good enough hear in all conscience in truth indeed indeedy indubitably ja just so mais oui manifestly most assuredly most certainly naturally naturellement nothing else but noticeably observably obviously of course okay oui patently positively precisely quite rather really right righto sensibly seriously sure sure thing surely to a certainty to be sure truly unambiguously undeniably unequivocally unmistakably verily very well visibly well and good why yes without doubt yea yeah yep yes yes indeed yes indeedy yes sir yes sirree