functions
词形变化：
形容词: functionless | 动词过去式: functioned | 动词过去分词: functioned | 动词现在分词: functioning | 动词第三人称单数: functions |
同义词：
work | operate | serve | perform | gathering | act | role | occupation | go | occasion | job | purpose | affair | run | meaning | ceremony | meeting | party | ritual | service | exercise | behave | rite | office | duty | capacity | obligation | performance | task | position | chore | business | commission | ceremonial | utility | play | stint | be | used | mapping | mathematical function | subroutine | map | single-valued function | subprogram | social function | use | procedure | part | routine | officiate | responsibility |
反义词：