Ywis

Y·wis' adverb [ Middle English ywis , iwis , Anglo-Saxon gewis certain; akin to Dutch gewis , German gewiss , and English wit to know. See Wit to know, and Y- .] Certainly; most likely; truly; probably. [ Obsolete or Archaic] « ' Yw...
Found on http://www.encyclo.co.uk/webster/Y/8

Ywis

• (adv.) Certainly; most likely; truly; probably.
Found on http://thinkexist.com/dictionary/meaning/ywis/
No exact match found