The word "lessen" in English means: To become smaller or less., To make something smaller or weaker..
The phonetic transcription of "lessen" is /ˈles.ən/ in British English and /ˈles.ən/ in American English. Click the 🔊 button to hear both pronunciations.
Synonyms for "lessen": reduce, decrease, diminish, weaken, alleviate, mitigate.
Example usage of "lessen": "The pain will lessen soon, so try to relax for a bit.". More examples on the page.