Having a glad or joyful heart; kind-hearted and cheerful in disposition.
Compound of 'glad' and 'hearted,' following the Middle English pattern of '-hearted' compounds (like 'kindhearted') to describe personality traits.
When people say someone is 'gladhearted,' they're making a metaphor where the physical heart becomes the seat of emotional disposition—showing how we locate personality in the body, not the brain.
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