to relieve /rɪˈliv/ /rɪˈliːv/
to alleviate /əˈliviˌeɪt/ /əˈliːvɪeɪt/
to mitigate /ˈmɪtəˌgeɪt/ /ˈmɪtɪgeɪt/
to assuage /əˈsweɪʤ/ /əˈsweɪʤ/
to soothe /suð/ /suːð/