If you are assuring, you relieve someone else’s fears. When your kid sister takes her first dive off the high dive, you might want to give her an assuring pat on the back . . . or a push.
The verb assure has origins in the Old French word asseurer, meaning “to reassure, calm, protect, and render sure.” If you are a coach, you may find yourself assuring your athletes of their preparedness and ability so they overcome their game-day jitters and have the confidence to do their best. Assuring can be used as an adjective, too: you are an assuring parent if you exhibit confidence in your child’s abilities, which will bolster his self confidence.