動詞 reassure:

1. cause to feel sure; give reassurance to
   同義詞：reassure, assure
2. give or restore confidence in; cause to feel sure or certain
   同義詞：reassure

形容詞 reassuring:

1. restoring confidence and relieving anxiety

1. The police reassured her about the child's safety.
   警察讓她放心，她的孩子很安全。
2. It is reassuring to be enquired after when you're ill. It shows your friends haven't stopped being concerned about you.
   如果能詢問一下你是何時生病的我們也就放心了。因為你的朋友一直在關心你。