お伺い

1. Origins, structure, and basic meaning

• Structure: お伺い(おうかがい) politely and humbly refers to asking or visiting.
• Basic usage: The examples ask permission to visit and express a wish to ask about a product.

2. Common pitfalls and similar expressions

• Whose action is made humble
  • お伺いする honors the other person by humbling the asking or visiting done by the speaker's side. Thus the first example asks permission for the speaker to visit, rather than asking the other person to come.