entrench

/ɛnˈtrɛntʃ/
verb
  1. To establish something firmly so that it is very difficult to change or remove.
    • The company's policies have become deeply entrenched over the years.
    • Old habits can entrench themselves if you are not careful.
    • The tradition was entrenched in the community for generations.
  2. To dig a trench or position troops in a trench for defense.
    • They entrenched themselves behind the hill to prepare for the attack.
    • The army entrenched along the river to block the enemy's advance.
    • The soldiers were ordered to entrench their position before nightfall.
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