assure

verb

as·​sure ə-ˈshu̇r How to pronounce assure (audio)
assured; assuring

transitive verb

1
: to make sure or certain : convince
glancing back to assure himself no one was following
2
: to inform positively
I assure you that we can do it.
3
: to make certain the coming or attainment of : guarantee
worked hard to assure accuracy
4
: to make safe (as from risks or against overthrow) : insure
assured the security of the country
5
: to give confidence to
And hereby we know that we are of the truth, and shall assure our hearts … 1 John 3:19 (King James Version)
Choose the Right Synonym for assure

ensure, insure, assure, secure mean to make a thing or person sure.

ensure, insure, and assure are interchangeable in many contexts where they indicate the making certain or inevitable of an outcome, but ensure may imply a virtual guarantee

the government has ensured the safety of the refugees

, while insure sometimes stresses the taking of necessary measures beforehand

careful planning should insure the success of the party

, and assure distinctively implies the removal of doubt and suspense from a person's mind.

I assure you that no harm will be done

secure implies action taken to guard against attack or loss.

sent reinforcements to secure their position

Example Sentences

I can assure you that you won't be disappointed. a minister choosing just the right words to assure the grieving parents of the fallen soldier
Recent Examples on the Web Still, some of the manufacturers are seeking the FDA’s imprimatur, saying agency approval would assure health-care providers and insurers about the value of the tests. Laurie Mcginley, Anchorage Daily News, 17 Nov. 2022 The new system would all but assure the state's No. 2 leader would be from the same party. Ray Stern, The Arizona Republic, 8 Nov. 2022 Would anyone who is into omens kindly assure me that democracy is not going to end? Thank you. Emily Sweeney, BostonGlobe.com, 7 Nov. 2022 An Austin loss to Real Salt Lake on Wednesday also would assure LAFC home-field advantage leading up to MLS Cup. Kevin Baxter, Los Angeles Times, 13 Sep. 2022 Eliminating access to natural gas is a mistake, especially in a state that cannot assure access to electricity. Jennifer Van Grove, San Diego Union-Tribune, 12 Aug. 2022 However, experts assure the results maintain that the use of Paxlovid can significantly reduce severe symptoms of COVID for high-risk patients who have underlying health conditions. Vanessa Etienne, PEOPLE.com, 14 July 2022 Chris Kastner’s mission now is to assure that HII can keep up with his Navy customer’s ambitious plans for the future, so that the company can meet the expectations of shareholders and stakeholders. Loren Thompson, Forbes, 25 Mar. 2022 The Kings had to make the playoffs last season to assure themselves and their fans the indignity of their post-Cup decline was a tolerable price to pay for a potentially bright future. Houston Mitchell, Los Angeles Times, 22 Sep. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'assure.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

Middle English, from Anglo-French asseurer, assurer, from Medieval Latin assecurare, from Latin ad- + securus secure

First Known Use

14th century, in the meaning defined at sense 4

Time Traveler
The first known use of assure was in the 14th century

Cite this Entry

“Assure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/assure. Accessed 29 Nov. 2022.

Kids Definition

assure

verb

as·​sure ə-ˈshu̇(ə)r How to pronounce assure (audio)
assured; assuring
1
: to provide a guarantee of
assure security
2
: to give words of comfort or confidence to : reassure
tried to assure the worried children
3
: to cause to be sure or certain
assure himself that the door was locked
4
: to inform positively
can assure you of her dependability

Legal Definition

assure

transitive verb

as·​sure
assured; assuring
1
chiefly British : insure
2
a
: to inform positively
the seller assured the buyer of his honesty
b
: to provide a guarantee of

More from Merriam-Webster on assure

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