The verb abate means to reduce, cease, or nullify the intensity, degree or force.
Synonyms are decrease, weaken, subside or decline.
The word origins from Middle English abaten, borrowed from the Old French (early 14th century) abatre meaning “beat down, cast down, strike down, fell, destroy, abolish, reduce, lower”.
As the storm abated, Larry went to check on his farm and fed his cows.
After three days of suffering, the pain on his left foot finally abated.
The advocates will never give up until the government takes an action to abate greenhouse-gas emissions.