lessen (lessens 3rd person present) (lessening present participle) (lessened past tense & past participle) If something lessens or you lessen it, it becomes smaller in size, amount, degree, or importance.
A look back at Hurricane Camille. Hurricane Camille, the USA's second strongest 20th century hurricane, hit the Gulf Coast in 1969. Camille became a hurricane on Aug. 15, 1969 south of Cuba and began quickly growing that night as it moved into the Gulf of Mexico. look back at Hurricane Camille. Hurricane Camille, the USA's second strongest 20th century hurricane, hit the Gulf Coast in 1969. Camille became a hurricane on Aug. 15, 1969 south of Cuba and began quickly growing that night as it moved into the Gulf of Mexico.
Andrew was a Category 5 at landfall, with maximum sustained winds of  165 mph and a minimum central pressure of 922 millibars. It it one of only three Category 5 hurricanes to make landfall in the United States since 1900 (the others being the 1935 Florida Keys Labor Day storm and Hurricane Camille in 1969).