reassure

Etymology

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

verb

1. (transitive) 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.
   "Taiwanese are very enthusiastic and love freedom and democracy, so many good international friends have come to Taiwan to support us. This is a normal and good thing, but China threatens and intimidates Taiwan," she said. "However, I would like to reassure everyone that both our government and the military are prepared, and I will definitely take care of Taiwan." August 13, 2022, Sarah Wu, David Kirton, Ben Blanchard, quoting Tsai Ing-wen, “Taiwan thanks U.S. for maintaining security in Taiwan Strait”, in Tom Hogue, Michael Perry, William Mallard, editors, Reuters, archived from the original on 2022-08-13, World
2. (transitive) To reinsure.