The quality of being dull and repetitive, with no variety or change.
From Greek monos (one) + tonos (tone or pitch). Originally it referred to speech or music lacking variation in tone, then broadened to describe anything lacking variety.
Your brain actually craves novelty—scientists have discovered that monotony triggers something called 'habituation,' where your neurons literally stop responding to repetitive stimuli. This is why the same routine every day can feel so exhausting even though you're not working harder.
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