conventional

a.普通的，常见的；习惯的，常规的

contumaciously, contumacy, contumely, contuse, contusion, conundrum, conurbation, convalesce, convalescence, convalescent, convection, convector, convene, convener (also convenor), convenience, convenience food, convenient, conveniently, convent, convention, conventionality, conventionalize, conventionalize, -ise, conventionally, conventions, converge, convergence, convergent, conversance, conversant, conversation, conversational, conversationalist, converse, conversely, conversion, convert, convert into, converter, convertor, convertibility,