The quality or state of being exceeding; the fact of surpassing or going beyond normal limits in degree or extent.
From 'exceeding' (adj./adv.) + '-ness' (the quality of). This abstract noun was formed to capture the essence of extreme excess as a measurable quality.
'Exceedingness' stacks suffixes like LEGO blocks—'exceed' becomes 'exceeding' (adjective) which becomes 'exceedingness' (the thing itself). It's what happens when you need to talk about the very CONCEPT of excess.
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