Someone who is well-off is rich enough to be able to do and buy most of the things that they want.
例句
My grandparents were quite well off.我的祖父母很富有。
英英词典释义
Adjective
1. in fortunate circumstances financially; moderately rich;
"they were comfortable or even wealthy by some standards""easy living""a prosperous family""his family is well-situated financially""well-to-do members of the community"