Assure vs. Reassure

(transitive) To make sure and secure.

To give (someone) confidence in the trustworthiness of (something).

Example: ‘I assure you that the program will work smoothly when we demonstrate it to the client.’; ‘He assured of his commitment to her happiness.’;

(obsolete) To guarantee, promise (to do something).

(transitive) To reassure.

To make sure or certain; to render confident by a promise, declaration, or other evidence.

Example: ‘His promise that thy seed shall bruise our foe . . . Assures me that the bitterness of deathIs past, and we shall live.’;

To declare to, solemnly; to assert to (any one) with the design of inspiring belief or confidence.

Example: ‘I dare assure thee that no enemyShall ever take alive the noble Brutus.’;

To confirm; to make certain or secure.

Example: ‘And it shall be assured to him.’; ‘And hereby we know that we are of the truth, and shall assure our hearts before him.’;

To affiance; to betroth.

To insure; to covenant to indemnify for loss, or to pay a specified sum at death. See Insure.

make certain of;

Example: ‘This nest egg will ensure a nice retirement for us’; ‘Preparation will guarantee success!’;

inform positively and with certainty and confidence;

Example: ‘I tell you that man is a crook!’;

assure somebody of the truth of something with the intention of giving the listener confidence;

Example: ‘I assured him that traveling to Cambodia was safe’;

be careful or certain to do something; make certain of something;

Example: ‘He verified that the valves were closed’; ‘See that the curtains are closed’; ‘control the quality of the product’;

cause to feel sure; give reassurance to;

Example: ‘The airline tried to reassure the customers that the planes were safe’;

make a promise or commitment

(transitive) To assure anew; to restore confidence to; to free from fear or self-doubt.

Example: ‘The boy's mother reassured him that there was no monster hiding under the bed.’;

(transitive) To reinsure.

To assure anew; to restore confidence to; to free from fear or terror.

Example: ‘They rose with fear, . . . Till dauntless Pallas reassured the rest.’;

To reinsure.

cause to feel sure; give reassurance to;

Example: ‘The airline tried to reassure the customers that the planes were safe’;

give or restore confidence in; cause to feel sure or certain;

Example: ‘I reassured him that we were safe’;