avari-

1. An insatiable greed for riches; inordinate, miserly desire to gain and hoard wealth.
2. An excessive desire for gain; greediness after wealth; covetousness; cupidity.

1. Characterized by avarice; greedy; covetous.
2. An extremely strong desire to obtain or keep material wealth.
3. Actuated by avarice; greedy of gain; immoderately desirous of accumulating property.

1. Covetously; with an inordinate desire of gaining wealth.
2. In a greedy manner.

1. Extreme greed for material wealth.
2. Cupidity (excessive desire, especially for wealth; greed; avarice).

Someone who has an excessive desire for material gain and greediness after gain.

He that loveth silver will not be satisfied with silver, nor he that loveth abundance with increase.

From the Old Testament: Ecclesiastes, V, 10 (c. 250 B.C.). It is probably the origin of "The More he has, the more he wants."

It is said that the multi-millionaire, John D. Rockefeller, was once asked, "How much money does it take to make a man happy?" His response: "Just a little more!"

A greedy man is always in need.

Also: "Avarice, or greed, is never satisfied."