隅々

1. Origins, structure, and basic meaning

• Structure: 隅々 is read as すみずみ and is a noun referring to every corner throughout a space or range.
• Basic usage: Cleaning a room thoroughly appears in 部屋の隅々まで掃除する, while knowing every part of a town appears in 町の隅々まで知る.

2. Common pitfalls and similar expressions

• Extent emphasized by まで
  • 隅々まで emphasizes that the action or knowledge reaches even the most out-of-the-way corners.
• Difference from 隅
  • 隅 can refer to one corner, while the repeated form 隅々 covers all the various corners.