to say or do something that makes someone less frightened or worried. synonym put/set somebody's mind at ease/rest.

There are four meanings listed in OED's entry for the verb reassure, one of which is labelled obsolete. See 'Meaning & use' for definitions, usage, ...

something that is said or done to take away a person's fears or doubts We were given reassurances that the water was safe to drink.

​making you feel less worried or uncertain about something. a reassuring smile; It's reassuring (to know) that we've got the money if necessary.

making you feel less worried or uncertain about something; a reassuring smile; It's reassuring (to know) that we've got the money if necessary.

7 дней назад · to comfort someone and stop them from worrying: [ + to infinitive ] I was nervous on my first day at college, but I was reassured to see some friendly faces.

There are two meanings listed in OED's entry for the word reassured. See 'Meaning & use' for definitions, usage, and quotation evidence.

Definition of reassuringly adverb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, ...

7 дней назад · to say something to stop someone from worrying. заверять, увещевать [ + that ] He reassured me that I would be paid soon.