Sarah'nın genç arkadaşları korkmaya başladı. Sadece o soğukkanlılığını korudu ve arkadaşlarını rahatlattı. - Sarah's young friends were starting to be scared. Only she kept her cool and reassured her friends.
Определение reassured в Английский Язык Английский Язык словарь
If you feel reassured, you feel less worried about something, usually because you have received help or advice. I feel much more reassured when I've been for a health check
give or restore confidence in; cause to feel sure or certain; "I reassured him that we were safe" cause to feel sure; give reassurance to; "The airline tried to reassure the customers that the planes were safe
If you reassure someone, you say or do things to make them stop worrying about something. I tried to reassure her, `Don't worry about it. We won't let it happen again.' She just reassured me that everything was fine. to make someone feel calmer and less worried or frightened about a problem or situation