Cheerful, lively, and full of joy or courage; showing a happy and brave spirit.
From Middle English 'herte' (heart) + 'som' (full of), combining the organ of emotion with a suffix meaning fullness or abundance. The word emerged in Scottish and Northern English dialects around the 15th century, originally describing someone whose heart was full of good feelings.
Before modern psychology, people literally believed happiness lived in the heart—so 'heartsome' wasn't just poetic, it was how people understood cheerfulness itself! This word shows how our ancestors mapped emotions onto body parts long before we knew about neurotransmitters.
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