Right side
聂 supplies the sound, niè drifting to shè through historical sibilant alternation. Same phonetic powers
摄 take in / photograph,
镊 tweezers.
聂 itself stacks three
耳 ears in the traditional form - the picture of three people huddled in whispered conference. Faint semantic flavor: to be
慑 is to feel cowed enough to keep your voice down.