What is the opposite of most beneficial?

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Contexts Opposite of superlative for advantageous, or providing benefit Opposite of superlative for having favorable consequences to one's health Adjective ▲ Opposite of superlative for advantageous, or providing benefit harmfullest baddest adversest direst unfriendliest cruelest uselessest evillest most detrimental most disadvantageous most damaging most unfavorableUS most unfavourableUK most destructive most disagreeable most hurtful most crippling most dangerous most deleterious most disastrous most inexpedient most injurious most menacing most objectionable most prejudicial most troublesome most unfortunate most unhelpful most unprofitable most catastrophic most inappropriate most inopportune most malignant most pernicious most sinister most subversive most unrewarding most unsafe most baleful most baneful most calamitous most cataclysmic most distressing most inconvenient most inimical most malefic most maleficial most malicious most nocuous most noxious most ominous most ruinous most uncomplimentary most unsavoryUS most unsavouryUK most upsetting most worthless “Not properly disposing of plastics can be detrimental to the environment.” Adjective ▲ Opposite of superlative for having favorable consequences to one's health unhealthiest deadliest most insalubrious most unhealthful most unwholesome most injurious most toxic most infectious most lethal most pestiferous most pestilential most unnutritious most unsalutary most virulent most carcinogenic most noxious most pestilent most poisonous most venomous “The doctor says eating plenty of processed food can be unhealthy.” Find more words! 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Use our Antonym Finder Nearby Words most benevolent most benighted most benignant most benignantly most benignly most benumbed most beneficent most benefic most bendable most bemused most belowground most beloved