slight

1. Origins, structure, and basic meaning

• Structure: 微 has 13 strokes and the on-reading び. 微妙 (びみょう) concerns subtle or unclear differences and states, while 微笑む (ほほえむ) describes smiling.
• Basic usage: 微笑む means to smile. 微妙 can describe a subtle difference or an ambiguous answer.

2. Common pitfalls and similar expressions

• Smiling, subtlety, and ambiguity
  • 母が微笑んだ means that the mother smiled. Learn 微笑む as the whole-word reading ほほえむ, distinct from び in 微妙.
  • 光の色が微妙に違います means that the colors of light differ subtly. 返事が微妙だったので describes an ambiguous answer that prompted another question about participation.