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.}}

Verb

(en verb)

To put (someone or something) in danger; to risk causing harm to.

* 1593, William Shakespeare, Two Gentlemen of Verona

I hold him but a fool that will endanger / His body [in a duel] for a girl that loves him not

* Burke

All the other difficulties of his reign only exercised without endangering him.

* 1877, Louisa May Alcott, Under the Lilacs

If you endanger other people's life and liberty in your pursuit of happiness, I shall have to confiscate your arms, boys.

(obsolete) To incur the hazard of; to risk; to run the risk of.

* Francis Bacon

He that turneth the humours back endangereth malign ulcers.