{f} settle firmly, strongly establish; establish a strong defensive position; dig foxholes or trenches for defense; intrude, encroach (also intrench)
If something such as power, a custom, or an idea is entrenched, it is firmly established, so that it would be difficult to change it. a series of measures designed to entrench democracy and the rule of law These dictators have entrenched themselves politically and are difficult to move. + entrenched en·trenched The recession remains deeply entrenched