noun
a lack of depth, superficiality
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The shallowness of his analysis was evident in his superficial understanding of the topic.
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She couldn't stand the shallowness of his jokes, they were just so surface-level.
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I can't deal with the shallowness of her gossip, it's all just so shallow and petty.
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The shallowness of his character ran deep, masking a complexity that few could see.