The phrase "entrenched system" refers to a well-established and difficult-to-change system or way of doing things. It implies that the system is deeply rooted, firmly established, and resistant to any new ideas or reforms. Full definition
«Any moves towards an online court for claims of up to # 25,000 must avoid the risk of entrenching a system of two - tier justice whereby individuals opting to use a «lawyerless» online court process could easily find themselves in litigation with big organisations which can afford to hire their own legal teams. (lawyer-monthly.com)
Through the inclusion of politically and historically relevant found fabrics in his collages, Adams comments on a period when infrastructure connected the country physically but deeply entrenched systems of exclusion prevented black travelers from crossing racial boundaries. (archpaper.com)