na-adjective, noun
greedy; avaricious; rapacious; insatiable
Describes a strong, often excessive desire for money, possessions, power, or food. Can be used as a noun or na-adjective.
彼は強欲な商人だ。
He is a greedy merchant.
強欲に利益を追求する。
Pursue profit greedily.
欲張り is a more colloquial and common word for greed, often used as a noun or na-adjective. 強欲 is stronger and more formal, implying an insatiable or rapacious nature.
貪欲 is similar in meaning but often used in a more positive or neutral sense of being eager or voracious, especially in learning or ambition, while 強欲 is almost always negative.
Compound of 強 (strong) and 欲 (desire). The exact historical derivation is uncertain, but the combination naturally yields the meaning of intense greed.