The quality of being accommodating; the state or condition of being willing to help or adapt.
From accommodate plus -ate (forming an adjective) plus -ness (forming an abstract noun). This creates multiple layers of word-building to express what 'accommodation' could say more simply.
English gives us 'accommodation' and 'accommodatingness,' so 'accommodateness' is technically redundant—it's like having three different words for the same concept because word-formation rules allow them.
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