/ ˌriːəˈʃʊərəns; -ˈʃɔːr-; NAmE -ˈʃʊr-/ noun reassurance (that ... )
1.
[ U ] the fact of giving advice or help that takes away a person's fears or doubts :
to give / provide / offer reassurance
2.
[ C ] something that is said or done to take away a person's fears or doubts :
We have been given reassurances that the water is safe to drink.