音韻

1. Origins, structure, and basic meaning

• Structure: 音韻(おんいん) is a noun for a sound unit that distinguishes meaning in a language or for the sound system formed by such units.
• Basic usage: Change over time appears in 音韻の変化, while comparison from a sound-system perspective appears in 音韻の面から比較する.

2. Common pitfalls and similar expressions

• Sound unit and system
  • Depending on context, it can focus on an individual phonological unit or on the whole sound system of a language or dialect.
• Expressing a perspective
  • Use 音韻の面から when comparing something specifically from its phonological aspect.