注音

zhù yīnzhuyin

to indicate the pronunciation of Chinese characters using Pinyin or Bopomofo etc
phonetic notation
(specifically) Bopomofo (abbr. for 注音符號|注音符号[zhu4 yin1 fu2 hao4])

Characters in this word

Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences