Meaning of well-entrenched in English:

well-entrenched

Pronunciation /ˌwɛlɪnˈtrɛn(t)ʃt/ /ˌwɛlɛnˈtrɛn(t)ʃt/

adjective

  • 1Of a military position or force: securely defended by a trench or trenches; well dug-in; (more generally) well-defended against attack.

  • 2Firmly established; difficult to challenge or dislodge; (hence) unlikely to change.

    Originally as part of an extended metaphor.

Origin

Late 16th century; earliest use found in William Garrard (d. 1587). From well + entrenched.