lessen vs. lesson
lessen
(make or become less strong, reduce, diminish)
- Regular exercise lessens the risk of heart disease.
- They are trying to find ways to lessen the financial burden.
lesson
(something you learn by study or experience)
- Our first lesson on Mondays is English.
- I’m taking driving lessons on Mondays and Thursdays.
- One man’s fault is another man’s lesson.