dilution
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：
Methods Test tube dilution method was used.
方法试管稀释法。
Ore spotting and pit supervision, to minimize ore loss and dilution.
测定矿石点位，监督矿坑工作，将矿石损失和贫化降低到最小程度。
Acid and dilution water feeds are usually proportioned in a predetermined ratio and interlocked.
硫酸和稀释用水通常按预先确定的比例供给并相互连锁。
Water sprays are used to break the foam by dilution and mechanical action.
采用水喷雾法，通过稀释和机械作用破坏泡沫。
A study on the dilution limitation of contaminants in groundwater
污染物在地下水中稀释的局限性研究
In the first method, one drop of this dilution is dropped into the conjunctival sac.
第一种方法是将一滴这种稀释液滴入结膜囊。