- 響く — to echo / resound
- 響き — resonance / timbre
- 反響 — echo / public reaction
- 音響 — acoustics / sound effects
- 影響 — influence / impact
響 combines the sound radical 音 with elements that suggest repetition and spread. Think of a sound that starts at one point and travels outward — first the sound, then an echo, and finally an influence that reaches people and things. That’s why it appears in words from pure acoustics (音響) to effects on people (影響).