verb (v)

• fix firmly or securely(verb.contact)

  Synonym:
  intrench
  

  source: wordnet30
• impinge or infringe upon(verb.social)

  Example:
  This matter entrenches on other domains.
  

  Synonym:
  encroach, impinge, trench
  

  source: wordnet30
• occupy a trench or secured area(verb.contact)

  Synonym:
  dig in
  

  source: wordnet30
• See Intrench.(verb)

  source: webster1913