妙

1. Origins, structure, and basic meaning

• Structure: 妙 (みょう) is a nominal stem expressing an oddly striking or hard-to-explain quality.
• Basic usage: 妙に説得力がある adverbially marks an unexpectedly convincing quality, while 妙な音 modifies a strange sound heard from a room.

2. Common pitfalls and similar expressions

• Unexpected degree and strange quality
  • 妙に modifies the degree of a following state, while 妙な directly attributes a quality to a noun. It is not fixed as either praise or an ominous judgment.