mindmap root((睿智)) shrewd stresses the possession or effect of practical, hardheaded cleverness and wise, although sometimes selfish judgment: a ~ judge of character. （这里judge作动词） sagacious suggests wisdom, penetration, farsightedness, and mature keenness of judgment: a series of ~ investments tripled her wealth. perspicacious implies unusual power to see into and understand what is puzzling and hidden: the ~ counselor saw through his facade. （façade: 建筑正面，外表假象） astute suggests shrewdness, perspicacity, and artfulness, and often an incapacity for being fooled: an ~ player of party politics.