1
general::
verb ADV. considerably, greatly, significantly Eating a good diet significantly lessens the risk of heart disease. | gradually Time had gradually lessened the pain of her grief. VERB + LESSEN begin to The noise began to lessen. | try to | tend to Too much background detail tends to lessen the impact of the central image. | help (to) Regular exercise can help to lessen the pain.
Oxford Collocations Dictionary