officiate

vt. 执行,司仪 vi. 主持主祭,行使职务

offensive, offensively, offensiveness, offer, offer sth., offer to do sth., offering, offertory, offhand, offhanded, office, office boy (fem 阴性作 `office girl), office holder (also `office bearer), office hours, office-block, officer, official, officialdom, officialese, officially, officious, officiously, officiousness, offing, offish, offline, offprint, offset, offshoot, offshore, offside, offspring, oft, oft-times, often, ogle, ogre, ogrish, oh, Ohio,