The quality of being uncalled for, unnecessary, or provided without charge or compensation.
From 'gratuity' (from Latin 'gratuitus,' meaning free or voluntary), combined with '-ousness' suffix. The noun form emphasizes the quality or state of being gratuitous.
Gratuitousness beautifully captures a paradox: something can be 'free' in two opposite ways—either costing nothing or being utterly pointless—and English uses the same word for both, which is kind of gratuitous itself.
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