When I was twenty-three years old, I was married to a handsome, well-built businessman.

well-built 是由副词 well（好地）和形容词 built（build 的过去分词形式）组成的复合形容词。build 的意思是"建造、塑造"，在这里指"体格、身材"。 well-built 字面意思是"建造得好的"，引申为"体格健壮的、身材匀称结实的"，通常用来形容男性健美的体型。