deleterious
Harmful, often in a subtle or unexpected wayHarmful, often in a subtle or unexpected way.
» Insufficient illumination is deleterious to ocular health.
Meaning
2 senses(formal)Harmful, often in a subtle or unexpected way.
deleterious effects
deleterious to someone's health
schädlich, gesundheitsschädlich
вре́дныйvrédnyj, вредоно́сныйvredonósnyj
шкідли́вийškidlývyj, згу́бнийzhúbnyj
harmful to living things
Having lower fitness.
A deleterious mutation
Examples
3 sentencesInsufficient illumination is deleterious to ocular health.
This would have a deleterious effect on our ability to organize.
We cannot continue to ignore the deleterious effects of these policies on our country.
Translations
9 languagesBy meaning 1
By meaning 1
By meaning 1
Origin
Adapted borrowing (1640s; 1582 as deletorious) of New Latin dēlētērius, dēlētōrius + -ous,Adapted borrowing (1640s; 1582 as deletorious) of New Latin dēlētērius, dēlētōrius + -ous, from Ancient Greek δηλητήριος (dēlētḗrios, “noxious, deleterious”), from δηλητήρ (dēlētḗr, “a destroyer”), from δηλέομαι (dēléomai, “I hurt, damage, spoil, waste”). Not related to delete or deleble. Doublet of deletery.
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Forms
more deleterious, most deleterious| Comparative | more deleterious Lesson |
|---|---|
| Superlative | most deleterious Lesson |
regular
Synonyms
19 synonymsWord family
4 related wordsLessons for this word
2 lessons- A2Comparatives — Because it has a comparative form
- A2Superlatives — Because it has a superlative form