Superlative form of loathly: most loathly.(adjective)
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Use "loathliest" in a sentence
"All loathliest things, even human flesh, was sold;"
"While death's blue vault with loathliest vapors hung,"
"I arose, I say, to a new heaven and a new earth: a heaven impossibly remote, an earth of sickly horror, an earth of serpents and worms, upon which I crawled and groped, the loathliest of their spawn."