The quality or state of being abortive; the condition of being unsuccessful or failing to produce desired results.
From 'abortive' plus the suffix '-ness' (quality or condition of), following the regular pattern of converting adjectives to abstract nouns.
Notice how one Latin root 'aboriri' (miscarry) generates an entire family: abort, abortion, abortive, abortively, abortiveness—showing how richly interconnected English word families can be.
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