The state or characteristic of being unnecessary.(noun)
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Use "unnecessariness" in a sentence
"I felt that God was surrounding you with love care and affection, not trying to get you to face up to your ultimate unnecessariness."
"I honestly confess that I should confine my grounds of opposition to the article thus stated to its unnecessariness, to the want of sufficient proofs from Scripture that I am bound to believe or trouble my head with it."
"A few stores still thrive, commercial success being in direct proportion to the unnecessariness of the product being provided by that store."