• 詔書しょうしょ — written imperial edict; formal proclamation
• 勅詔ちょくしょう — imperial command or decree
• 大詔たいしょう — grand imperial proclamation
• 詔みことのり — an imperial edict; words formally issued by the emperor

With the speech radical 言 on the left and 召 (“to call; to summon”) on the right, 詔 shows words that officially summon people — a ruler’s spoken will turned into a formal announcement.