convention

n.会议，大会；惯例，习俗；公约，协定

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