from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Archaic Certainly; assuredly.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adv. Certainly, surely, indeed.
from the GNU version of the Collaborative International Dictionary of English
- adv. Indeed; truly. See ywis.
from The Century Dictionary and Cyclopedia
- Certainly; surely; truly; to wit.
- n. Certainty: used in the adverbial phrases mid iwisse, or to iwisse, for certain, certainly.
Middle English, from Old English gewis, certain; see weid- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English iwis, ywis ("certain, sure"), from Old English ġewiss ("certain, sure"), from Proto-Germanic *gawissaz (“known, certain, sure”), from Proto-Indo-European *weyd- (“to know”). Cognate with Dutch gewis ("sure"), German gewiss ("certain"), Danish vis ("sure"). More at wit, wis. (Wiktionary)