Englishfor English speakers
roof
Noun
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A roof is the top part of a building.
My five brothers, two sisters and seven cousins all live together under one roof.
roof
Verb
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If you roof something, then you are putting a roof onto a building.
My father had to roof our house because it needed a roof.
lens
Noun
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A lens is a specially shaped piece of glass that is used in cameras or telescopes to bend light.