summon

1. Origins, structure, and basic meaning

• Structure: 召 is associated with summoning; its on-reading is しょう and its kun-reading is めす.
• Basic usage: 召集 means an official summons or convocation; 召し上がる, read めしあがる, is an honorific expression for eating.

2. Common pitfalls and similar expressions

• Showing respect to the person eating
  • 召し上がる shows respect to the person eating, such as a teacher or guest. 召し上がってください is used when inviting that person to eat.