Showing great effort and strain, or worked hard on something; the past tense of labor.
From Latin 'laborare' meaning 'to work' or 'to be in distress.' The root 'labor' entered English through Old French. The adjective meaning 'strained' developed from the sense of working with difficulty.
The phrase 'labor of love' captures something beautiful—that humans are willing to work incredibly hard on something that matters to us, even when it's exhausting. The word itself comes from Latin times when physical labor was the dominant form of work in society.
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