adv. Now arch. [f. prec.] In a soothfast manner; truthfully, truly, veritably, etc.
a. 890. Charter, in O. E. Texts, 452. Ic wille þæt hio sion soðfestliche ʓetrymed me & minum erfeweardum.
c. 1200. Ormin, 2995. Forr uss birrþ unnderrstanndenn wel & soþfasstlike trowwenn, Þatt [etc.].
a. 1300. Cursor M., 9746. I sal on me O thral tak clething sothfastli.
a. 1340. Hampole, Psalter x. 6. He anly demes sothfastly of þaire consciens.
a. 1400. Hylton, Scala Perf., I. lxviii. (W. de W., 1494). He that is perfytly and sothfastly meke.
1456. Sir G. Haye, Law Arms (S.T.S.), 26. The exposicioun of the visioun was suthfastly approvit.
c. 1500. Lancelot, 1397. Suthfastly I will Ȝour ordynans in euery thing fulfyll.
a. 1555. Philpot, Exam. & Writ. (Parker Soc.), 423. Whiles soothfastly they do confess Christ to be the saviour.
1818. Scott, Rob Roy, xxiii. But, if I were to come, wad ye really and soothfastly pay me the siller?