The property or nature that gives rise to revulsion, that inspires loathing.(noun)
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Use "loathsomeness" in a sentence
"That there might have been reasons for his loathsomeness that invite sympathy doesn't change the fact that he was an obnoxious drunk, an emotional bully and sadist, a sexual predator, a rotten husband and an alternately cruel and neglectful father, and it wasn't as though, like Hemingway, he punctuated his awfulness with acts of heroism and generosity."
"There's plenty of meanness, pettiness, selfishness, and loathsomeness out there; let's focus some attention on the greatness."
"But aside from the loathsomeness of Levy's no-holds-barred campaign against undocumented workers, Cox's theory made some sense."