'self-resentment' originates from the combination of 'self' and 'resentment', where 'self' refers to one's own person and 'resentment' means a feeling of displeasure or anger.

'resentment' changed from the Old French word 'ressentir', which meant 'to feel strongly', and eventually became the modern English word 'resentment'.

Initially, 'resentment' meant 'to feel strongly', but over time it evolved into its current meaning of 'a feeling of displeasure or anger'.