Englishfor English speakers
obscure
Adjective
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If something is obscure, it is not easy to understand.
The textbook the teacher was using in her class was obscure.
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If something is obscure, it is not bright in color or appearance; it is dull or dark.
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If something is obscure, it is very hard to make out a clear image of it; it is faint; it is unclear or vague.
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If something is obscure, it is hidden; it is out of sight.
The Johnsons decided to have a date at an obscure retreat.
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If a place where people live is obscure, it is found far away from where most other people live.
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If something is obscure, it is not easily seen; it is inconspicuous.
The ruby had an obscure flaw in it.
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If somebody is obscure, they are not known; they have no fame and are not notable.
obscure
Verb
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If someone obscures something, they darken it; they make it faint.
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If someone obscures something, they hide it from sight; they put it out of sight.
The fog obscured the road ahead of Sherry while she was driving.
The cloud was obscuring the light from the Sun while they moved over the Sun.
by
Preposition
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near or next to.
The mailbox is by the bus stop.
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at some time before (the given time).
Be back by ten o'clock!
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if something is done by somebody, it is done through their action
The matter was decided by the chairman.
The boat was swamped by the water.
He was protected by his body armour.
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if something is created by somebody, they are the creator, author, etc.
There are many well-known plays by William Shakespeare.
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shows how someone does something
I avoided the guards by moving only when they weren't looking.
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using the rules or logic of.
I sorted the items by category.
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with a change of. In this case, by shows how much something has changed.
Our stock is up by ten percent.
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shows how slowly, or how quickly, someone does something (used in the form "X by X" or "by Xs")
We went through the book page by page.
We crawled forward by inches.
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If you multiply mathx/math by mathy/math, you multiply mathx/math × mathy/math.
Five multiplied by seven is 35.
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If you divide mathx/math by mathy/math, you find how many mathy/maths are in mathx/math.
35 divided by seven is five.
cloud
Noun
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A cloud is a collection of condensed water vapor floating in the sky that sometimes makes rain.
Those dark storm clouds are quickly getting closer.
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A cloud is a group or swarm of something.
The cloud of locusts flew closer to the corn.
cloud
Verb
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If something is clouded, it becomes foggy or gloomy; it becomes blocked from sight.
The sky clouded over.
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If something is clouded, it becomes obscure.
Don't cloud the issue.