cryptogram

n message written in code 密码材料; 密码文件.

crust, crustacean, crusty, crutch, crux, cry, cry down, cry for, cry off, cry out, cry-baby, crybaby, crying, cryogenic, cryogenics, crypt, crypt(o)-, cryptic, cryptically, cryptogam, crystal, crystal ball, crystal clear, crystal set, crystal-gazing, crystalline, crystallization, -isation, crystallize, crystallize, crystallise, crystallized, -ised, CSE, CSM, CST, ct, cu, cub, cub reporter, cubby-hole, cube, cube root,