KanjiJLPT N2
Summon

seduce, call, send for, wear, put on, ride in, buy, eat, drink, catch (cold)

Mnemonic

A royal herald slams his sword against the marble floor, opens his mouth, and bellows the decree to summon every lord to the king's court. The ringing of sword on stone and the booming mouth leave no doubt—this summon is absolute.
Additional thoughts
Picture the sword striking stone to demand silence, then the mouth roaring out names one by one. Authority flows from blade and voice together—steel enforces what the voice commands.
Quick recall
A herald strikes his sword on stone, opens his mouth, and issues the royal summon.

Details

The keyword for 召 is summon. This kanji conveys the act of calling someone to come before you, particularly by someone of authority or higher status. It is used in contexts such as being summoned by a ruler, a court, or a superior, carrying a formal and commanding tone. The character implies an authoritative invitation or order to appear, distinguishing it from a casual or informal request.
On'yomi
しょう
Kun'yomi
め.す