en·trench·ment
noun/ɪnˈtrentʃmənt/
/ɪnˈtrentʃmənt/
- [uncountable] the fact of something being strongly established
牢固确立；根深蒂固 - [countable, usually plural] a system of trenches (= long narrow holes dug in the ground by soldiers to provide defence)
堑壕；战壕