Verb

(convinc)

To make someone believe, or feel sure about something, especially by using logic, argument or evidence.

* Atterbury

Such convincing proofs and assurances of it as might enable them to convince others.

To persuade.

(obsolete) To overcome, conquer, vanquish.

* Shakespeare

His two chamberlains / Will I with wine and wassail so convince / That memory, the warder of the brain, / Shall be a fume.

(obsolete) To confute; to prove wrong.

* Francis Bacon

God never wrought miracle to convince' atheism, because his ordinary works ' convince it.

(obsolete) To prove guilty; to convict.

* Bible, John viii. 46

Which of you convinceth me of sin?

* Dryden

Seek not to convince me of a crime / Which I can ne'er repent, nor you can pardon.

Verb

(ensur)

To make a pledge to (someone); to promise, guarantee (someone of something); to assure.

*:

*:Thenne he cryed hym mercy and sayd Faire knyght for goddes loue slee me not / and I shall ensure the neuer werre ageynst thy lady / but be alwey toward her / Thenne Bors lete hym be

To make sure or certain of something (usually some future event or condition).

:

*{{quote-magazine, date=2013-08-10, volume=408, issue=8848, magazine=(The Economist), author=Lexington

, title= Keeping the mighty honest , passage=British journalists shun complete respectability, feeling a duty to be ready to savage the mighty, or rummage through their bins. Elsewhere in Europe, government contracts and subsidies ensure that press barons will only defy the mighty so far.}}