And also anodyr, my brodyr Wyllyam heryth sey in the corte, that the Kyng and my lord be content that the remenaunt of the fych be to the use of them of the cuntre, the wech ze schall here the more serteyn therof here after.
It iss told me forserteyn that ther is none hey to gete at Caleys; wherfor if I mygh be pardond for eny kepyng of horse at Caleys till Myd somer, it wer a good torne.
Also as for orenges, I schall sende yow a serteyn by the next caryer.
Other tydyngs, I herd sey fforserteyn that the Lady Fitzwater is ded, and that Master Fytzwater shall have CCCC.
Item, I pray yow send serteynwoorde how the world gothe.
It is so nowe that I undrestond that he is owther deed or ellys harde eskapyd, wheroff I am ryght hevye, and am not serteyn whethyr the seyd lettyr and rynge come to yowr handys or nott.
Purvey a meane to have Caster ayen or ye goo ovyr; my Lord and Lady (whyche for serteyn is gret with chyld), be wery ther of, and all the housold also.
Also ther be serteyn materz betwyn soom of your tenuantez and me.
And the seyd Waynflet teld me that he knowyth for serteyn that the Kyng cometh not to Northefolk til he hathe been upon the Marchys of Walys, and so there is no serteynte of hyse comyng thys many dayez.
Pepyll of this contre begynyth to wax wyld, and it is seyd her that my Lord of Clarans and the Dwek of Suthfolk and serteyn jwgys with hem schold come downe and syt on syche pepyll as be noysyd ryotous in thys contre.
I knowe for serteynand it had pleasyd you to have endyd be the meanys of trety, ye had ma[de] .
Sir Lowes John, fermours of the seid maner, serteyn mony for repayment of part of the seid CCC.
Sir, I beseke youre maistirshyp to remembre my maystresse for the lytil sylvir, whiche for serteyn thyngs delyverid to youre use is dewe to me.
On Thursday last past at London was no tydings in serteyn where the flet was, nor what they had doon, and therfore I fere the tydings the more.
Lord Warwyk had sent to the Kyng, and informyd hyse Hyghnesse that the Lord Summyrset had wretyn to hym to come to grace; but of the fleet of shyppis there is no tydings in serteyn at London on Monday last past.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "serteyn" in a variety of sentences. We hope that you will now be able to make sentences using this word.