4. wealthy  富裕的（主要用语物质财富，比rich文雅）新概念英语官网

She is rich, almost wealthy.

well-to-do 富裕的，小康的（定语或表语）

   John’s father owns a company and his family is well-to-do.

well off 富裕的，处境好的（表语）

fat cat 大款

a man/woman of means 富人

5。disappearance n.消失

vanish v.消失（指突然的消失）

      His prospects /hopes of success have vanished.

get out of sight 看不见了

      The train soon went out of sight.

fade away /fade out 逐渐消失

      All memory of his childhood faded from his mind.

6。 ransom n. 赎金

pay ransom to sb.

      The old lady paid a ransom of one thousand pounds to the kidnapper.

hold sb to ransom 绑票（索取赎金）

      They kidnapped the boy and held him to rensom.