大学英语：重要词汇grat,gree=pleasing,表示“感激，高兴”

gratitude n 感激，感恩(grat+itude状态)

gratuity n 赏钱;赠品(grat+uity→因感激给→赏钱→小费)

gratuitous a 无缘无故的; 免 费的(来自gratuity赏钱，给小费可多可少，所以“无缘无故的”)

ingratiate v 迎合，讨好(in进入+grat+iate→使[别人]进入高兴→讨好[别人])

ingratiating a 讨好的，诌媚的(ingratiate+ing)

gratify v 使满足;喜悦(grat+ify使…→使[人]满足，高兴)

gratification n 满足;喜悦(gratify+ication)

grateful a 感谢的;愉快的(grate+ful多…的)

ingrate n 忘恩负义之人(in不+grate→不感激→忘恩负义)

grace n "优美，文雅(grace=grat,感激别人态度一定好，所以grace有了“文雅”的意义)"

gracious a 文雅的;亲切的(grace+ions)

agreeable a 愉快的;适意的(a+gree=able;agree“同意”)

agreement n 协议;一致(agree+ment)

disagree v 不一致，争执(dis不+agree同意)