Learn how to say Summon correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word summon:
to order to come; send for, esp to attend court, by issuing a summons
to order or instruct (to do something) or call (to something) ⇒ the bell summoned them to their work
to call upon to meet or convene
(often followed by up) to muster or gather (one’s strength, courage, etc)