What context can I use each word in?
Learn when and how to use these words with these examples!
undangerous
Example
The amusement park ride was deemed undangerous by safety inspectors. [undangerous: adjective]
Example
The medication is undangerous when taken as directed. [undangerous: adjective]
harmless
Example
The spider in the corner of the room is harmless and can be left alone. [harmless: adjective]
Example
Playing video games for an hour a day is harmless if done in moderation. [harmless: adjective]
Good things to know
Which word is more common?
Harmless is more commonly used than undangerous in everyday language, and it is more versatile in its usage.
What’s the difference in the tone of formality between undangerous and harmless?
Both undangerous and harmless are relatively formal words, but harmless can be used in both formal and informal contexts, while undangerous is more commonly used in technical or scientific contexts.
