"vilest" in the adjective sense
1. despicable, ugly, vile, slimy, unworthy, worthless, wretched
morally reprehensible
"would do something as despicable as murder"
"ugly crimes"
"the vile development of slavery appalled them"
"a slimy little liar"
2. nauseating, nauseous, noisome, queasy, loathsome, offensive, sickening, vile
causing or able to cause nausea
"a nauseating smell"
"nauseous offal"
"a sickening stench"
Source: WordNet® (An amazing lexical database of English)
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