stay

1. Origins, structure, and basic meaning

• Structure: 留 has 10 strokes and concerns staying or keeping something in place.
• Basic usage: 留学 is read りゅうがく, and 留守 is read るす.

2. Common pitfalls and similar expressions

• Readings and meanings by word
  • The 留 in 留学 is read りゅう.
  • 一年間留学した means studied abroad for a year.
  • The 留 in 留守 is read る.
  • 留守だった means was away from home.