The Collaborative International Dictionary of English v.0.48:

Assoilment \As*soil"ment\, n.
   Act of assoiling, or state of being assoiled; absolution;
   acquittal.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Assoilment \As*soil"ment\, n.
   A soiling; defilement.
   [1913 Webster] Assoilzie