entrenchment

1. N-COUNT Entrenchments are a series of long deep holes called trenches that are dug for defence by soldiers in war. 堑壕; 战壕[usu pl]

2. N-UNCOUNT Entrenchment means the firm establishment of a system or your own position in a situation. 根深蒂固; 牢固

...the entrenchment of democratic norms. ...民主规范的牢固确立。