certes
/ˈsəːtɪz
/adverb archaic
Assuredly; I assure you.For certes it was later than I had bargained and at this late of an hour it was unlikely that I would find a winsome partner....
- What seemed an eternity yet for certes was but a few moments I struggled to free myself from the carnage and whence I gained my feet stood amongst the mixed forces of those who did survive.
- For certes I knew not.
Origin
Middle English: from Old French, based on Latin certus 'settled, sure'.