Englishfor English speakers
cavity
Noun
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A cavity is a hole or hollow area.
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A cavity is a hollow area inside the body (like the sinuses).
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A cavity is a hole in a decayed tooth.
You have a cavity in your back teeth.
coupled
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adjective
(= linked)
connected by a link, as railway cars or trailer trucks
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adjective
(= conjugate)
joined together especially in a pair or pairs