asper
rough, harsh, roused to anger
Usage
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asperity
Asperity is a sharpness or harshness of tone or manner; it can also indicate severity of a climate.
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exasperate
When you exasperate another person, you annoy or anger them a great deal because you keep on doing something that is highly irritating.
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exasperating
extremely annoying or displeasing
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exasperation
an exasperated feeling of annoyance
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