discard         
 verb uk/dɪˈskɑːd/ us/dɪˈskɑːrd/
 [ T ]抛弃,扔掉 
to throw something away or get rid of it because you no longer want or need it
  Discarded food containers and bottles littered the streets. 街上到处都是被丢弃的食品包装和瓶子。 
  [ I or T ]出(牌) 
to get rid of a card you are holding during a card game
 discard      
noun [ C ] uk/dɪˈskɑːd/ us/dɪˈskɑːrd/
 出掉的牌
in a card game, a card that you have got rid of