Of a certainty, certainly.
Cer"tes (?), adv. [F. certes, for Ó certes, fr. L. certus. See Certain.] Certainly; in truth; verily. [Archaic]
Certes it great pity was to see
Him his nobility so foul deface.
Spenser.
Cer*tif"i*cate (?), n. [F. certificat, fr. LL. certificatus made certain, p. p. of certificare. See tify.] 1. A written testimony to the truth of any fact; as, certificate of good behavior.