razor-blade

n blade (esp one that is disposable) used in a safety razor 保险刀片（尤指供一次使用的）.

raver, ravine, raving, ravings, ravioli, ravish, ravishing, ravishingly, raw, raw material, raw-boned, rawhide, rawness, ray, ray (also re), rayon, raze, raze (also rase), razor, razor-back, razor-edge, razor-sharp, razz, razzle, razzmatazz, RC, RCM, RD, re, re-, re-count, re-create, re-creation, re-echo, re-educate, re-education, re-elect, re-election, re-enter, re-entry,