[ɛnˈtrɛn(t)ʃ], (Verb)

Definitions:
- establish (an attitude, habit, or belief) so firmly that change is very difficult or unlikely
(e.g: ageism is entrenched in our society)

- establish (a military force) in trenches or other fortified positions
(e.g: the corps was now fully entrenched on the Right Bank)

- encroach or trespass on
(e.g: concessions which entrenched so deeply on the honour and dignity of the Crown)


Phrases:

Origin:
mid 16th century (in the sense ‘place within a trench’): from en-, in- ‘into’ + trench