"The new policy was designed to lessen traffic congestion during rush hour."
Conj
1
unless.
"The word "unless" cannot be used as a synonym for "lessen," so no natural example sentence can be created that uses "lessen" to mean "unless." These two words have completely different definitions and grammatical functions; "lessen" is a verb meaning to make something smaller or less intense, while "unless" is a conjunction used to introduce an exception. Therefore, it is impossible to write a single sentence where "lessen" demonstrates the meaning of "unless" because such a usage does not exist in English."
Example Sentences
"The amount of homework decreased towards the end of the semester"verb