lavish
词根词缀：
ablution n. 沐浴；净化
ab 去掉 + lut 洗，冲洗 + ion 表动作 → 洗掉〔脏东西〕→ 沐浴
dilute v. 冲淡
di 分开 + lut 冲洗 + e →〔用水〕冲洗开 → 冲淡
dilution n. 冲淡；稀释物
dilute的名词
lavatory n. 洗手间
lav 洗，冲洗 + atory 场所 → 冲洗的地方 → 洗手间
lavish v. 浪费
lav 洗，冲洗 + ish 使… → 冲掉 → 浪费
lavish adj. 浪费的
数据来源：新东方英语词汇速记大全
相关例句：
So far his lavish lifestyle has taken him to Hong Kong, Bali and Thailand.
到目前为止，在挥霍的生活方式下，他去了香港，巴厘岛和泰国。
He is lavish of his presents.
他送礼很慷慨。
The callous couple milked money from a hospital charity to fund a lavish lifestyle.
为了过上奢靡的生活，这对冷漠无情的夫妇竟然贪污医院的慈善基金。
Lavish gifts were bestowed on the visitors. They are courteous to their guests.
向来宾赠送了厚礼。他们对来宾彬彬有礼。
The book drew lavish praise from literary critics.
文学评论家们对此书好评如潮。
She was quick and efficient, and soon, a lavish dinner was laid out.
她手脚麻利，不一会儿一桌酒菜就端上来了。