assure
verb
as·sure ə-ˈshu̇r 
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)
1 John 3:19 (King James Version)
Synonyms
- cheer
- comfort
- console
- reassure
- solace
- soothe
See all Synonyms & Antonyms 
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 As if to assure us that his long winning streak is significant, that McEwan will enjoy a healthy literary afterlife, the Harry Ransom Center at the University of Texas paid $2 million for his papers in 2014. Adam Begley, The Atlantic, 9 Sep. 2022 The tennis star also took to social media to assure his 16 million Instagram followers that the injury wasn't going to derail him. Natasha Dye, Peoplemag, 2 Sep. 2022 Blizzard will doubtlessly put its best foot forward at launch to assure players that there’s nothing to fear, but as anyone who has played a live service game can tell you, things can change. Aaron Zimmerman, Ars Technica, 2 Sep. 2022 Newsom’s administration agreed to make went a long way to ease concerns over the plant’s safety and to assure its extended operations would not increase costs for utility customers. Dustin Gardiner, San Francisco Chronicle, 1 Sep. 2022 Jay Lerner, the Park District’s executive director, said the second grade swim program is part of the effort to assure every child in Waukegan has the opportunity to learn how to swim. Steve Sadin, Chicago Tribune, 1 Sep. 2022 Dropping free RATs just in time to assure a winter surge. Martin Finucane, BostonGlobe.com, 29 Aug. 2022 Others asked in the chat feature whether Toolsie had any proof and what could be done to assure that no one else has a similar experience. From Usa Today Network And Wire Reports, USA TODAY, 25 Aug. 2022 The main solution for this has been ways to assure supervisory attention remains high. Brad Templeton, Forbes, 25 Aug. 2022 See More
Adam Begley, The Atlantic, 9 Sep. 2022 The tennis star also took to social media to assure his 16 million Instagram followers that the injury wasn't going to derail him. Natasha Dye, Peoplemag, 2 Sep. 2022 Blizzard will doubtlessly put its best foot forward at launch to assure players that there’s nothing to fear, but as anyone who has played a live service game can tell you, things can change. Aaron Zimmerman, Ars Technica, 2 Sep. 2022 Newsom’s administration agreed to make went a long way to ease concerns over the plant’s safety and to assure its extended operations would not increase costs for utility customers. Dustin Gardiner, San Francisco Chronicle, 1 Sep. 2022 Jay Lerner, the Park District’s executive director, said the second grade swim program is part of the effort to assure every child in Waukegan has the opportunity to learn how to swim. Steve Sadin, Chicago Tribune, 1 Sep. 2022 Dropping free RATs just in time to assure a winter surge. Martin Finucane, BostonGlobe.com, 29 Aug. 2022 Others asked in the chat feature whether Toolsie had any proof and what could be done to assure that no one else has a similar experience. From Usa Today Network And Wire Reports, USA TODAY, 25 Aug. 2022 The main solution for this has been ways to assure supervisory attention remains high. Brad Templeton, Forbes, 25 Aug. 2022 See More 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
Phrases Containing assure
Kids Definition
assure
verb
as·sure ə-ˈshu̇r
assured; assuring
1
: to give certainty, confidence, or comfort to
He assured the children all was well.
She assured herself that the doors were locked.
2
: to inform positively
I assure you that you won't be disappointed.
3
: to provide a guarantee of
assure their safety
Hard work assures success.
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
assure
verb
1
as in to reassure
to ease the grief or distress of a minister choosing just the right words to assure the grieving parents of the fallen soldier Synonyms & Similar Words
Relevance
- reassure
- comfort
- soothe
- cheer
- console
- solace
- uplift
- sympathize
- relieve
- alleviate
- allay
- empathize
- condole
- commiserate
- lift
- calm
- elevate
- assuage
- quiet
- relax
- boost
- tranquillize
- tranquilize
- buoy (up)
Antonyms & Near Antonyms
- discourage
- worry
- distress
- trouble
- torment
- upset
- demoralize
- intensify
- torture
- aggravate
- annoy
- irritate
- worsen
- dishearten
- fret
- harass
- irk
- pester
2
as in to ensure
to make sure, certain, or safe security measures that assured our safety Synonyms & Similar Words
- ensure
- guarantee
- insure
- secure
- guaranty
- ice
- promise
- cinch
- certify
- vouch
- witness
- attest
- warrant
- pledge
- swear
Antonyms & Near Antonyms
- undermine
- weaken
- enfeeble
Synonym Chooser
Some common synonyms of assure are ensure, insure, and secure. While all these words mean "to make a thing or person sure," assure distinctively implies the removal of doubt and suspense from a person's mind.
I assure you that no harm will be done
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
The synonyms insure and assure are sometimes interchangeable, but insure sometimes stresses the taking of necessary measures beforehand.
careful planning should insure the success of the party
In some situations, the words secure and assure are roughly equivalent. However, secure implies action taken to guard against attack or loss.
sent reinforcements to secure their position