deleterious
adjective | /deleterious/
harmful often in a subtle or unexpected way
deleterious
adjective | /deleterious/
Advanced WordsMEDIUMharmful often in a subtle or unexpected way
Learning Progress
Synonyms
Antonyms
Examples
"Smoking has deleterious effects on long-term health."
"The policy had deleterious consequences for small businesses."
Mnemonic Trick
DELETE + RIOUS → imagine something that deletes/ruins health: harmful.
Etymology
From Greek dēlētērios “causing harm,” from dēlētai “to destroy.”
Used for subtle or lasting harm.
Continue Learning
Community Stats
Track Your Progress
Sign up to save your favorite words and track your learning progress across all vocabulary types.
Take your English vocabulary to the next level
Vocabulary Builder is a smart and comprehensive English vocabulary app designed to help you learn, remember, and master words effectively. Whether you are preparing for competitive exams or improving everyday English, the app goes beyond simple definitions to ensure deep understanding and long-term retention.

