Assure

Pronunciation

• RP IPA: /əˈʃʊə/

Origin

From Old French asseürer (Modern French assurer), from Latin ad- + securus ("secure").

Full definition of assure

Verb

1. (transitive) To make sure and secure.
2. (transitive, followed by that or of) To give (someone) confidence in the trustworthiness of (something).I assure you that the program will work smoothly when we demonstrate it to the client.He assured of his commitment to her happiness.
3. (obsolete) To guarantee, promise (to do something).
• 1590, Edmund Spenser, The Faerie Queene, II.ii:That as a law for euer should endure;
  Which to obserue in word of knights they did assure.
4. To reassure.