'warm-heartedness' originates from the combination of 'warm' and 'hearted,' where 'warm' meant 'having or showing enthusiasm, affection, or kindness' and 'hearted' referred to 'having a specified feeling or mood.'

'Warm-hearted' evolved from the Old English word 'wearm' meaning 'warm' and 'heorte' meaning 'heart,' eventually forming the modern English word 'warm-heartedness.'

Initially, it meant 'having a warm heart,' and over time it evolved into its current meaning of 'the quality of being kind and friendly.'