Word
aggrade
淤高；使（河床）淤高
build up to a level by depositing sediment
- 1.
to raise the level of a river bed by the deposition of sediment
通过沉积物抬高河床
通过沉积物抬高河床；使河床升高
In use
Flooding aggrades the riverbed by depositing mud and sand.
The stream aggraded its channel after heavy rain washed soil into it.
We must avoid aggrading the river further by dumping construction waste.
aggrade sth
用于主动语态，后接宾语，宾语通常为河道或河流地形。
The river aggrades its channel.
河流使自己的河道升高。
sth aggrades
不及物用法，主语为河流地貌，表示自身因沉积而升高。
The floodplain aggrades slowly.
洪泛区缓慢升高。
be aggraded
被动结构，强调受事，常用by引出施动者。
The valley was aggraded by glacial outwash.
这个山谷被冰川冲积物淤高了。
Verb forms
base aggrade · third person aggrades · -ing aggrading · past aggraded · past participle aggraded
Common mistakes
The river aggrades every year.The river aggrades its bed every year.
‘aggrade’是及物动词，后面需要跟宾语（如 riverbed），不能直接用作不及物动词。中文学习者受中文‘河床升高’表达影响，容易省略宾语。
The company tried to aggrade its reputation.The company tried to aggrandize its reputation.
‘aggrade’和‘aggrandize’拼写相似但意义不同。‘aggrade’意为使河床升高，而‘aggrandize’意为扩大权力或声誉。中文学习者容易混淆这两个词。
Connections
Confusing words
- degrade
- 降低 · 使河床降低，与aggrade相反
- aggrandize
- 扩大，夸张 · 指夸大或增加权力、地位，而非沉积使河床升高
Learner notes
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.