Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb lessen

3 senses of lessen

Sense 1
decrease, diminish, lessen, fall -- (decrease in size, extent, or range; "The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper")
       => change magnitude -- (change in size or magnitude)

Sense 2
decrease, lessen, minify -- (make smaller; "He decreased his staff")
       => change, alter, modify -- (cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue")

Sense 3
subside, lessen -- (wear off or die down; "The pain subsided")
       => weaken -- (become weaker; "The prisoner's resistance weakened after seven days")