crank

n (derog 贬) person with strange fixed ideas, esp on a particular subject; eccentric person 有古怪成见的人（尤指在某问题上）; 有怪癖的人: a health-food crank, ie one who insists on eating unusual food for health reasons 对保健食品有偏好怪癖的人.

cradle, craft, craftily, craftiness, craftsman, craftsmanship, crafty, crag, craggy, cram, cram-full, crammer, cramp, cramped, crampon, cranberry, crane, crane-fly, cranial, cranium, crankshaft, cranky, crannied, cranny, crap, crape, crappy, craps, crapulence, crapulent, crash, crash barrier, crash helmet, crash-dive, crash-land, crash-landing, crass, crassly, crassness, crate,