The Collaborative International Dictionary of English v.0.48:

Assist \As*sist"\, v. t. [imp. & p. p. Assisted; p. pr. & vb.
   n. Assisting.] [L. assistere; ad + sistere to cause to
   stand, to stand, from stare to stand: cf. F. assister. See
   Stand.]
   To give support to in some undertaking or effort, or in time
   of distress; to help; to aid; to succor.
   [1913 Webster]

         Assist me, knight. I am undone!          --Shak.
   [1913 Webster]

   Syn: To help; aid; second; back; support; relieve; succor;
        befriend; sustain; favor. See Help.
        [1913 Webster]

WordNet (r) 3.0 (2006):

assisted
    adj 1: having help; often used as a combining form [syn:
           assisted, aided] [ant: unassisted]