院宣[inzen] imperial command (decree)
共同宣言[kyoudousengen] joint declaration
口宣[kousen] oral statement
宣べる[noberu] to state
宣教[senkyou] religious mission

宣教師[senkyoushi] missionary
宣言[sengen] declaration
宣言発表[sengenhappyou] declaration
宣告[senkoku] sentence
宣誓[sensei] oath

曰く[iwaku] pretext
曰く付き[iwakutsuki] with an interesting history (story)

曰く言い難し[iwakuiigatashi] It is hard to explain
曰う[notamau] to say