redoubt

n (a) last defensive position within a system of fortifications （防御系统中的）最後阵地. (b) isolated fortified outpost 孤立的前哨站.

redeemable, redemption, redemptive, redeploy, redeployment, redevelop, redevelopment, redhead, rediculous, rediffusion, redirect, rediscover, redistribute, redistribution, redly, redness, redo, redolence, redolent, redouble, redoubtable, redound, redress, redskin, reduce, reduce to, reducible, reductio ad absurdum, reduction, redundancy, redundant, redundantly, reduplicate, reduplication, redwood, reed, reediness, reedy, reef, reef-knot (US square-knot),