warm

1. Origins, structure, and basic meaning

• Structure: 温 has 12 strokes and denotes warmth or warming something.
• Basic usage: 温まる is read あたたまる, and 温める is read あたためる.

2. Common pitfalls and similar expressions

• What warms up and what is heated
  • 冷えた手が温まる describes cold hands becoming warm.
  • 冷めたスープを鍋で温める describes heating cooled soup in a pot. を marks what is heated.
• Warmth of body and heart
  • 体も心も温まった describes both the body and the heart growing warm.