inveterate: applies to something, such as a habit, attitude or feeling, of such long existance as to be almost ineradicable or unalterable: an ~ smoker.


confirmed: implies a growing stronger and firmer with passage of time, so as to resist change or reform: a ~ bachelor.


chronicle: sug. the long duration of sth. usually undesirable that resists attempts to cure or alleviate: sick and tired of his ~ complaining.


deep-seated: applies to qualities, attitudes so firmly established as to become part of the very structure: a ~ fear of heights.


deep-rooted: applies to sth. deeply established and of lasting endurance: the causes of these problems are ~ and can't be eliminated overnight.


inveterate: 习惯态度感情长期存在==>难以根除改变根深蒂固, confirmed: 与日俱增==>难以改变, chronicle: 不好事物长期存在,不减轻改善, deep-seated: 牢固建立-->成为"一部分", deep-rooted: 深深建立-->长期存在。


记忆方法: 1）首字母联想I CCDD，爱闯荡<--不变的本色。

         2）根深蒂固的意思是牢牢建立mean firmly established.