Deleterious Definition

dĕlĭ-tîrē-əs
adjective
Harmful to health or well-being; injurious.
Webster's New World
The definition of deleterious is something that is harmful or damaging.
An example of deleterious is how smoking can kill a human being.
YourDictionary
Antonyms:

Origin of Deleterious

  • From Ancient Greek δηλητήριος (dēlētērios, “noxious, deleterious”), from δηλητήρ (dēlētēr, “a destroyer”), from δηλέομαι (dēleomai, “I hurt, damage, spoil, waste”).

    From Wiktionary

  • From Greek dēlētērios from dēlētēr destroyer from dēleisthai to harm

    From American Heritage Dictionary of the English Language, 5th Edition

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