Definition
To lessen something is to make it smaller in amount, degree, or intensity — the plain, neutral 'make less'. You lessen the risk, the impact, the pain, the chance of failure: a measurable quantity simply goes down. It is the most everyday and least dramatic member of its family. Unlike mitigate, which counters or cushions a harmful effect, and unlike ease, which gently soothes something felt, lessen just reduces how much of something there is. It can also be intransitive — over time the pressure lessened on its own.
Examples
- Wearing a helmet does not remove the danger, but it does lessen the risk of serious injury.
- The new bypass should lessen the volume of traffic passing through the town centre.
- Nothing could lessen her determination to finish the race.
Collocations
lessen the risk·lessen the impact·lessen the pain·lessen the burden·greatly lessen·lessen the likelihood
Synonyms
Antonyms
increase·heighten·aggravate·intensify
Word family
lessening (noun)
In TOEFL & IELTS
A reliable, neutral verb for reduction, especially with abstract nouns: 'lessen the risk', 'lessen the impact', 'lessen the likelihood'. It is a workhorse in problem-solution and cause-effect writing, where a measure lessens a danger or a drawback. Keep it apart from its near-neighbours: lessen is the plain 'make less' of an amount, mitigate is to counter or limit a harmful effect (often preventively), and ease is to soothe something gradually. Lessen works both transitively (the policy lessened poverty) and intransitively (the pain lessened).