закоренелый

1) General subject: brass collar, brassbound, case hardened, case-hardened, confirmed, crusted (о привычках, предрассудках), deep-rooted, desperate, double dyed, double-dyed, dyed in the wool, dyed-in-the-wool, engrained, hard core, impenitent, in grain, in grained, ingrain, ingrained, inveterate, of the blackest (deepest) dye, old, rock-ribbed (часто о членах республиканской партии США), thorough paced, thorough-paced, tough, hardline (hardline Communist), die-hard, old-school

2) Rare: inworn

3) Law: hardened, persistent

4) Diplomatic term: hard-core

5) Politics: absolute, arrant, blatant, hardcore, hopeless, out and out, outright, paid-up, total, unrelieved, utter

6) Graphic expression: nuts-and-bolts (nuts-and-bolts fascist)

7) Makarov: black, dye-in-the-wool, of the blackest dye, of the deepest dye