Certain.

Assured of its object; confident, certain. Obsolete.

Well-ascertained, certain, sure. Of an argument: Well-founded, valid. Obsolete.

Infallible, positive, certain. †Also as adv.

That has been decided; about which a judgement or decision has been made; settled; not open to question or change.

= assured, adj. (in various senses).

That one may rely on as true; undoubted, indisputable; definite.

Confirmed, made certain.

Of a state of mind, purpose, etc.: decided, determined. Also of an action: carefully considered; done with full awareness or consciousness.

fast and sure: well assured, certain. Obsolete.

Incapable of deceiving; undeceptive; certain, sure. Obsolete.

About the nature of which no doubt is entertained; accepted as true, certain, or genuine.

Established as a truth or fact to be absolutely received, depended, or relied upon; not to be doubted, disputed, or called in question; indubitable…

true (also good, sure) as touch: perfectly or absolutely true (good, sure). Obsolete.

Firm in opinion, certain, confident.

Explicitly laid down; expressed without qualification; admitting no question; stated, express, definite, precise; emphatic; †objectively certain (obs…

Precise, exact; †certain.

Made in proper form, regular, complete. Also in familiar use, ‘regular’, unmistakable. Obsolete.

(un-, prefix1 affix 1.)

Without qualifying or limiting conditions; unconditional.

Not subject to or limited by conditions; unconditioned.

(un-, prefix1 affix 1.)

Of belief, conviction, etc.

Not problematic; straightforward.

Not precarious; safe, secure, stable.

Not going astray from the intended mark; certain, sure. Of aim, agents or agencies, etc.

Unquestionably true; established as fact. Obsolete. rare.

Of knowledge, etc.: irrefutable, reliable, based on solid evidence. Of a fact or truth: incapable of being denied or explained away (though…

= unproblematic, adj.

Distinct; marked, pronounced; unmistakable; = decided, adj. 1b.

Quite certain, sure, unerring. (Cf. dead certainty in sense A. 31a.) dead shot, one whose aim is certain death; so dead on the bird. dead-on…

Of a victory, success, etc.: unquestionable, undoubted; certain, absolute, easy.