red · cinnabar

1. Origins, structure, and basic meaning

• Structure: 丹 has four strokes and has meanings related to red.
• Basic usage: In 丹念 and 丹精, it is read たん and forms words about care and attention rather than color.

2. Common pitfalls and similar expressions

• Not literally red
  • 丹念, read たんねん, describes meticulous care.
  • 丹念に磨く means to polish carefully, not to polish something red.
• Devoted effort
  • 丹精, read たんせい, refers to devoted care and effort.
  • 丹精を込めて育てる means to grow or raise something with devoted care.
• Similar meanings, different constructions
  • 丹念な調査 means a meticulous investigation; 丹精を込める means to put devoted effort into something.
  • Their shared connection with care does not make their following grammatical forms interchangeable.