Englishfor English speakers
necessary
Adjective
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Something is necessary if people need it. It must happen or there will be a big problem.
It's necessary to stop when you see a red light.
necessary
Noun
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A necessary is a bathroom.
absence
Noun
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Absence is when something is not there.
There was an absence of help for the project.
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An absence is a time something is not there.
I failed the class because I had too many absences.