greediness       
noun [ U ] uk/ˈɡriː.di.nəs/ us/ˈɡriː.di.nəs/
 贪吃;贪财;贪婪
the quality of wanting a lot more food, money, etc. than you need
  My family can't understand why I might need to eat more, and tell me it's greediness. 我的家人不明白为什么我可能需要多吃,只是说我贪吃。 
 The smugglers are fuelled by greediness. 贪婪驱使着走私者。 
 See: greedy
 - More examples
 - She quickly became known for her greediness and insensitivity to the beggars who came seeking help.
 - People used to eat together in groups. It was a shame and a sign of greediness to eat alone.
 - His appetites were strong to the point of greediness.