v.
  
/
dɪˈskɑːd/
 get rid of (something) as no longer useful or desirable. 
▸(in bridge, whist, and similar card games) play (a card that is neither of the suit led nor a trump), when one is unable to follow suit.
n.
  
/
ˈdɪskɑːd/
 a discarded item, especially a card in bridge or whist.
Derivative
  
    
      - discardable
 /dɪsˈkɑːdəb(ə)l/
 adj.
 
  Etymology
  C16: from dis- + card1.