悉悉索索

xīxīsuǒsuǒ
  1. (onom.) rustling sound (of clothing, leaves, snow etc)
  2. faint noises

CEDICT

onomatopoeic

Entry Composition

1 悉 xī
  1. in all cases
  2. know
2 悉 xī
  1. in all cases
  2. know
3 索索 suǒsuǒ trembling