Browse
Parts of Speech
Sentence & Structure
Rules & Mechanics
Adjectives
Differences
Vocabulary lists, grammar guides, dictionary entries, and interactive quizzes - all designed to help you master English one word at a time.
/pəˈnɪʃəs/
Having a harmful effect, especially in a gradual or subtle way.
Example
"The pernicious rumor ruined her reputation."
Etymology (Origin)
From Latin perniciosus.
Explore our latest dictionary additions
Explore our latest vocabulary additions
Explore our latest grammar additions
Explore our latest word differences additions
Explore our latest describing words additions
Explore our latest quizzes additions
Explore our latest games additions