四隅

1. Origins, structure, and basic meaning

• Structure: The written form is 四隅, read よすみ. Elements for four and corner combine to denote all four corners of a rectangular object or space.
• Basic usage: 紙の四隅 identifies the four corners of a sheet, while 部屋の四隅 extends to every corner of a room.

2. Common pitfalls and similar expressions

• Four corners taped down
  • All four corners of the paper are taped to the desk. Example: 紙の四隅をテープで机に留めた。 — I taped all four corners of the paper to the desk.
• Every corner cleaned
  • The cleaning reaches every corner of the room. Example: 部屋の四隅まで丁寧に掃除した。 — I thoroughly cleaned every corner of the room.