the.com/entrenchment

means The act of digging in—literally or figuratively—so that a position, habit, or idea becomes firmly established and very hard to dislodge.

from From the French verb 'entrancher,' to dig a trench, built from 'en-' (to make, to put into) plus 'trenche,' a cutting or ditch—itself from 'trenchier,' to cut or slice (the same root that gives us 'trench' and a distant cousin of 'trenchant'). It began as a soldier's word for carving defensive ditches into the earth, then marched into the abstract, where positions and beliefs dig in just as stubbornly as armies once did.