形容詞 well-to-do:

1. in fortunate circumstances financially; moderately rich
   同義詞：comfortable, easy, prosperous, well-fixed, well-heeled, well-off, well-situated

well-to-do

adj.（形容詞）
Prosperous; affluent; well-off.
富裕的；富有的；有錢的
n.(used with a pl. verb)（名詞）（與復數動詞連用）
Affluent or wealthy people:
富人：富有的或有錢的人們：
例句：
Demonstrators protested that the tax bill favored the well-to-do.
示威者們抗議征稅法案偏袒富人

來源：
From the phrase well to do in the world
源自片語 well to do in the world
well 2[prosperous, affluent]
well2[富裕的，富有的]
to [for]
to[為了]
do [doing]
do[做]