adj
harmful
HAHMFL
adj
1
Likely to cause harm, injury, or damage.
"Too much sun exposure can be harmful to your skin."
"The report warned of harmful side effects from the drug."
How to Use Harmful
Learner’s notesIn plain EnglishDamaging or dangerous; likely to hurt someone or something.
Easily confused with
Common pairings
harmful effects
harmful chemicals
potentially harmful
Word Forms
harmfuller comparative, more harmful comparative, harmfullest superlative, most harmful superlative
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Too much sun exposure can be _____ to your skin.
Etymology
From Old English, built from harm + the suffix -ful.