noun
a person or thing that causes boredom
verb
to make someone feel uninterested or tired by being dull or repetitive
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The lecture on quantum physics was so dry and technical that it seemed to bore the entire audience.
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I'm sorry, but this movie is starting to bore me. Can we watch something else?
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I can't stand listening to him talk anymore, he just bores me to tears.
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The routine of everyday life can sometimes feel like a never-ending bore.