嚶嚶 [嘤嘤]

Jyutping 嚶 嚶
Pinyin yīng yīng

Definitions (Wiktionary)
  1. noun, figuratively, literary
    congenial friends
  2. noun, literary, onomatopoeic
    murmuring; mumbling; muttering
  3. noun, onomatopoeic, slang
    sobbing; weeping; whimpering; crying
  4. noun, literary, onomatopoeic
    A sharp or clear sound.
  5. noun, literary, onomatopoeic
    chirping; tweeting (in harmony)