noun
something that is irregular, such as an irregular shape or occurrence
adjective
not following a regular pattern or rule; uneven or inconsistent
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The irregular weather patterns have been causing disruptions in agricultural activities.
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Her work schedule is quite irregular, she never works the same hours each day.
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I don't like the irregular vibe I get from that guy, he seems shady.
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The irregular heartbeat of the city reminded him of the chaotic nature of life.