I'm not really sure that this is what's meant here. I know it doesn't quite express the "evil" bit - maybe something along the lines of "warded off his evil" or "kept him at bay".

to appease: To pacify or attempt to pacify (an enemy) by granting concessions, often at the expense of principle.

to pacify: To ease the anger or agitation of.

to ward off: avert, turn away, repel

يستخدم عادة في الكتابات اللاهوتية، ومعناه من جهة الله تعالى تهدئة غضبه (ضد الخطية)، ولكنه يستخدم أحياناً بمعنى اتقاء الأمر أو تجنبه كما في الرابط أدناه، مثلاً
To propitiate the tongue of gossip.

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Note added at 4 hrs (2007-05-22 14:40:32 GMT)
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I mean the verb by itself when used to refer to God, that is for sure. Evil applies to humans only.