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What is the opposite of deleterious?

Need antonyms for deleterious? Here's a list of opposite words from our thesaurus that you can use instead.

(harmless) Opposite of harmful, often in a subtle or unexpected way
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“Waste in landfills decays in physical, chemical, and biochemical processes that may eventually render it environmentally harmless.”
(beneficial) Opposite of harmful, often in a subtle or unexpected way
“Treatments such as ice, heat, and mobilization may be beneficial in healing.”
Opposite of not characterized by or conducive to physical health or well-being
Opposite of harmful or likely to injure
Opposite of evil or morally wrong
“Just as crimes were severely punished, statues of virtuous men publicly honored good deeds.”
Opposite of of, pertaining to, or as a result of malice or spite
“He enjoyed the music so much he went to the piper and gave him enough to buy whiskey for himself and his friends, which was a lovely gesture from a lovely man.”
Opposite of very great in degree, often with bad or negative repercussions
“What seems to many a trifling matter of wording could have profound consequences.”
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