adverb
(rare, obsolete or dialectal) Certainly, surely.
(rare, obsolete or dialectal) Really, truly.
(rare, obsolete or dialectal) Indeed.
adjective
(rare, obsolete or dialectal) Certain.
(rare, obsolete or dialectal) Sure.
verb
(obsolete or archaic) To know.
(obsolete or archaic) To think, suppose.
(obsolete or archaic) To imagine, ween; to deem.