/ ˈmɪtɪgeɪt; NAmE / verb
[ vn ] ( formal ) to make sth less harmful, serious, etc.
SYN alleviate :
action to mitigate poverty
Soil erosion was mitigated by the planting of trees.
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WORD ORIGIN
late Middle English : from Latin mitigat- softened, alleviated, from the verb mitigare , from mitis mild.