Here is a handy post from the Libro Editing blog on the difference between the words warn and worn.
This is a tricky one for those who get vowels mixed up; often people coming to English from a language that doesn’t mark vowels in the same way, such as Arabic, can get caught out by all our very similar words, especially when they sound almost the same.
To warn, a verb, means to alert someone about something which is about to happen, usually bad. You can issue a warning (the noun) or be warning (verb) someone about the problem.
Worn is the past tense of wear OR an adjective arising from it, and both words have two meanings: to have on the body, as in clothes (I will wear a hat today)…
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