embassage
/ˈembəsɪdʒ/noun
1- archaic the business or message of an envoy〈古〉使节的使命。
1.1
- a body of people sent as a deputation to or on behalf of a head of state（外交）使团。
词源
late 15th cent. (denoting the action of sending an envoy)： from Old French ambasse 'message or embassy'+ -AGE.