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.

Adjective
(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.”
Adjective
(beneficial) Opposite of harmful, often in a subtle or unexpected way
“Treatments such as ice, heat, and mobilization may be beneficial in healing.”
Adjective
Opposite of having or displaying malice, evil or vindictiveness
Adjective
Opposite of evil or morally wrong
“Just as crimes were severely punished, statues of virtuous men publicly honored good deeds.”
Adjective
Opposite of characterized by or causing degeneration
Adjective
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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