primer

n. 启蒙书，识字课本

prim, prima ballerina, prima donna, prima facie, primacy, primaeval, primal, primarily, primary, primary colour, primary education, primary school, primate, prime, prime cost, prime meridian, prime minister, prime mover, prime number, prime time, primeval, primeval (also primaeval), primitive, primitively, primitiveness, primly, primness, primogeniture, primordial, primordially, primp, primrose, primula, Primus, prince, Prince Consort, princedom, princely, princess, Princeton,