Truly1. (adv.) In a true manner; according to truth; in agreement with fact; as, to state things truly; the facts are truly represented.
2. (adv.) Exactly; justly; precisely; accurately; as, to estimate truly the weight of evidence.
3. (adv.) Sincerely; honestly; really; faithfully; as, to be truly attached to a lover; the citizens are truly loyal to their prince or their country.
4. (adv.) Conformably to law; legally; legitimately.
5. (adv.) In fact; in deed; in reality; in truth.
Thesaurus Entries
OK, Roger, absolutely, accurately, actually, all right, alright, alrighty, amen, and no mistake, as you say, assuredly, at all events, at any rate, aye, beyond question, by all means, certainly, clearly, confidently, da, de facto, decidedly, decisively, definitely, demonstrably, distinctly, doubtlessly, duly, easily, exactly, factually, fine, for a certainty, for a fact, for certain, for real, for sure, forsooth, genuinely, good, good enough, hear, historically, honestly, in actuality, in all conscience, in effect, in fact, in reality, in sooth, in truth, in very sooth, indeed, indeedy, indubitably, ja, just so, justifiably, justly, legitimately, mais oui, manifestly, most assuredly, most certainly, naturally, naturellement, nay, nothing else but, noticeably, observably, obviously, of a truth, of course, okay, oui, patently, positively, precisely, probably, properly, quite, rather, really, really-truly, right, rightfully, rightly, righto, sensibly, seriously, sincerely, sure, sure thing, surely, to a certainty, to be sure, to speak truthfully, truthfully, unambiguously, undeniably, undoubtedly, unequivocally, unmistakably, unquestionably, veraciously, verily, veritably, very well, visibly, well and good, why yes, with truth, without doubt, yea, yeah, yep, yes, yes indeed, yes indeedy, yes sir, yes sirree