Failure; doubt. Only in withouten wantruke: without fail; undoubtedly.

without miss: undoubtedly, certainly. Cf. without fail at fail, n.2 1. but miss (Scottish): rightly, certainly, indeed. Obsolete.

Without doubt or apprehension of mistake; doubtless. Cf. dread, n. 3. Obsolete.

Without doubt or question; unquestionably, undoubtedly, certainly. Now generally concessive of something asserted or claimed.

Without fail, unfailingly, infallibly.

Certainly, irrefutably; in a manner not open to dispute. Obsolete.

Without question, beyond all question; unquestionably; undoubtedly. Now poetic and archaic.

Without doubt; indubitably.

Unquestionably, certainly, surely; = doubtless, adv.

Indisputably.

As adv. = undoubtably, adv. Obsolete.

As adv. = undoubtedly, adv. 1. Obsolete.

Without or beyond any doubt; indubitably, assuredly, certainly.

Without fail or liability to prove false; most certainly, indubitably.

In an indefeasible manner; so as to be indefeasible.

undoubtedly, unquestionably, without doubt.

Scottish. Undoubted; also adv., undoubtedly. Obsolete.

Scottish. Undoubtedly. Obsolete. rare.

undoubtedly.

As a sentence adverb.

(a) = questionless, adv.; (b) without asking questions.

Beyond the possibility of doubt; unquestionably; without any doubt.

†Without doubt; indubitably.

As if uncontrovertible. Obsolete.

So as not to admit of being refuted; incontrovertibly, indisputably.

Unquestionably.

not doubtfully; clearly, certainly.

(a) Without control; unrestrainedly; †(b) Incontrovertibly, fixedly.

In an incontrovertible manner; without controversy, beyond dispute, indisputably.

In an indisputable way; without possibility of dispute; unquestionably.

By general, or one's own, acknowledgement; admittedly, confessedly.

impregnably, invincibly.

= uncontrovertibly adv. at uncontrovertible, adj. derivatives.

= indubitably, adv.

in a way not to be confuted.

Incontrovertibly, indisputably. Obsolete.

In an irrefutable manner; so as to be incapable of being refuted; incontrovertibly.

(un-, prefix1 affix 5.)

Unquestionably, indisputably, indubitably.

Without dispute or question.

colloquial. (and) no mistake: without any doubt, undoubtedly, for certain. Used to emphasize the validity of a preceding statement. Also attributive…

Law. without resort: without the possibility of appeal. Obsolete. rare.

Indubitably.

so as to preclude refusal of acceptance.

Inevitably; undeniably.

Without or beyond argument or debate; indisputably. Frequently as a sentence adverb.

= sure, adv.

colloquial (originally U.S.). Placed between subject and verb as an intensifier: certainly, undoubtedly.

Emphatically; without a doubt, irrefutably. Also used as an emphatic affirmative: yes, certainly, definitely. Frequently paired with absotively, adv.

Used as a sentence adverb, expressing emphatic assertion of a superlative: without doubt; by a long way.