The Collaborative International Dictionary of English v.0.48:

Excuss \Ex*cuss"\, v. t. [L. excussus. p. p. of excutere to
   shake off; ex out, from + quatere to shake. Cf. Quash.]
   1. To shake off; to discard. [R.]
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            To excuss the notation of a Geity out of their
            minds.                                --Bp.
                                                  Stillingfleet.
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   2. To inspect; to investigate; to decipher. [R.]
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            To take some pains in excusing some old monuments.
                                                  --F. Junius
                                                  (1654).
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   3. To seize and detain by law, as goods. [Obs.] --Ayliffe.
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