Englishfor English speakers
flexible
Adjective
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When something is flexible, it can bend.
The thin wood stick was so flexible that it would bend but not break.
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By extension, the word is used as a metaphor. For example, when a person or thing is flexible, they can change.
Jim was very flexible and enjoyed every new experience when he travelled.
I think we can make working hours much more flexible.
They used to treat everyone the same but now take a more flexible approach.
arch
Noun
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A semi-circle shape, like an inverted "U".
Robert drew an arch on the paper.
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Any object having the shape of an arch, from stone bridges and doorways to bows.
They went through the arch into the church.
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A part of the foot, on the bottom, which is shaped like an arch.
She stepped on a nail and hurt the arch of her foot.
arch
Verb
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To make into the shape of an arch.
The cat arched its back.
arch
Prefix
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Arch added to the start of a word signifies it is important or the most important
An archbishop is a senior bishop.
-book villains may be an arch-enemy.