re ‧ as ‧ sur ‧ ing /ˌriːəˈʃʊərɪŋ◂ $ -ˈʃʊr-/ BrE AmE adjective
making you feel less worried or frightened SYN comforting :
a reassuring smile
it is reassuring (for somebody) to do something
It’s reassuring to know that problems are rare.
—reassuringly adverb