Lazy, idle, or habitually inactive; showing a lack of diligence or effort.
From Latin desidiosus, formed from desidium (laziness, idleness) plus -osus (full of, inclined to). The root may connect to de- (away from) + sedium (seat, position), suggesting abandoning one's duties.
This obscure word captures a very specific ancient Roman criticism—not just being lazy, but being lazy in a way that shows character flaw and neglect of duty. Romans took 'desidiosity' seriously as a moral failing!
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