hall

1. Origins, structure, and basic meaning

• Structure: 堂 denotes a hall or building space; its on-reading is どう.
• Basic usage: 食堂(しょくどう) means a dining hall or cafeteria, while 堂々(どうどう) expresses confidence or an imposing manner.

2. Common pitfalls and similar expressions

• A confident action and an imposing presence
  • 堂々と入場した means that someone entered confidently. 堂々と describes the manner of the action.
  • 堂々たる演説 means an imposing speech. Notice the form 堂々たる used before a noun.