Please explain “for lack of a better word” in this quote: “Greed, for lack of a better word, is good.” “Greed is good” is ...

微软近10多年市值爆增，一半归功于营收重回两位数的增长，另一半归功于估值的提升，通过云计算和AI业务，提升了未来增长的确定性，从而从2010年的15倍估值，到近几年一直保持在30~35倍估值之间。