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 the passage of time so as to resist change or reform: a ~ bachelor.           单身汉


chronic: suggests the long duration of something usually undesirable that resists attempts to cure or alleviate: sick and tired of his ~ complaining.             注意是形容词chronic，之前错写成了chronicle编年史历史       慢性疾病chronic disease，本例长期迟到


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


deep-rooted: applies to something deeply established and of lasting endurance: the causes of the problem are ~ and cannot be eliminated overnight.


inveterate积习难改: 习惯态度感情长期存在难以改变根除，confirmed与日俱增的: 与日俱增难以改变，chronic长期的慢性的: 不好事物长期存在，不能改善，deep-seated根深蒂固: 牢固建立，以致成为一部分，deep-rooted根深蒂固: 深深建立，长期存在


记忆方法: 1) 首字母I CCDD联想我闯闯荡荡<==根深蒂固的习惯

               2) 根深蒂固的意思是牢固建立mean firmly established.首字母I CCDD联想我闯闯荡荡<==根深蒂固的习惯