officiate
verb- [intransitive, transitive] officiate (at) something
to act as an official in charge of something, especially a sports event 主持（工作）；（尤指体育比赛）担任裁判 A referee from a neutral country will officiate (at) the game. 一名来自中立国的裁判将担任这场比赛的裁判。
- [intransitive] officiate (at something) (formal)
to do the official duties at a public or religious ceremony 主持（仪式）；履行职务 He baptized children and officiated at weddings. 他给孩子们施洗礼, 也主持婚礼。
Word Originmid 17th cent.: from medieval Latin officiare ‘perform divine service’, from officium ‘performance of a task’ (in medieval Latin also ‘office, divine service’), based on opus ‘work’ + facere ‘do’.