Dictionary.com

harmful

[ hahrm-fuhl ]
/ ˈhɑrm fəl /
Save This Word!
See synonyms for: harmful / harmfully on Thesaurus.com

adjective
causing or capable of causing harm; injurious: a harmful idea; a harmful habit.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachWrite or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing
Meet Grammar CoachImprove Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of harmful

before 1000; Middle English; Old English hearmful.See harm, -ful

OTHER WORDS FROM harmful

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use harmful in a sentence

British Dictionary definitions for harmful

harmful
/ (ˈhɑːmfʊl) /

adjective
causing or tending to cause harm; injurious

Derived forms of harmful

harmfully, adverbharmfulness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK