To Palliate

1. To relieve the symptoms of; to ameliorate. [from 15th c.]
2. (obsolete) To hide or disguise. [16th–19th c.]
3. To cover or disguise the seriousness of (a mistake, offence etc.) by excuses and apologies. [from 17th c.]
4. (obsolete) To lessen the severity of; to extenuate, moderate, qualify. [17th–18th c.]
5. To placate or mollify. [from 17th c.]