embassage
/ˈɛmbəsɪdʒ
/noun archaic
1The business or message of an envoy: [count noun]: he listened to this late embassage [mass noun]: envoys of uncertain embassage
1.1A deputation sent to or on behalf of a head of state.
Origin
Late 15th century (denoting the action of sending an envoy): from Old French ambasse 'message or embassy' + -age.