reassure

verb

Etymology: From Old French rasseürer (French rassurer), from re- + asseürer; as if re- + assure.

1. To assure anew; to restore confidence to; to free from fear or self-doubt.

   “The boy's mother reassured him that there was no monster hiding under the bed.”

   “What is more, I call upon the greater part of you as witnesses to my statement, and I appeal to all of you who have ever listened to me talking (and there are a great many to whom this applies) to reassure one another on this point.”

2. To reinsure.