WordNet sense 1 (hold back to a later time):

defer, postpone, prorogue, shelve, table, hold over, set back, put off, put over

WordNet sense 2 (refer (a matter or legal case) to another committee or authority or court for decision):

remand, send back

WordNet sense 3 (make slack as by lessening tension or firmness):

slacken

WordNet sense 4 ((law) the act of remitting (especially the referral of a law case to another court)):

remission, remitment