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alleviate

[uh-lee-vee-eyt] / əˈli viˌeɪt /
VERB
relieve; lessen
Synonyms
STRONGEST
allay assuage ease mitigate
STRONG
lighten mollify pacify remediate soft pedal
WEAK
pour oil on take the bite out take the edge off take the sting out
Antonyms
STRONGEST
increase intensify irritate worsen
STRONG
agitate depress incite upset
WEAK
aggravate heighten magnify

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.