襯字 [衬－]

Jyutping can3 zi6
Pinyin chèn zì

Definitions (粵典–words.hk)
  1. 名詞、術語
    曲詞​文句​中加​插​嘅​字​，​用​嚟​修飾​內容​、​補充​語氣​或者​方便​歌唱​；​喺​粵​曲​又​稱​孭​仔​字
    words inserted outside melodic form prescribed
Definitions (Wiktionary)
  1. noun
    character inserted into a line of verse (especially in qu) or lyrics for balance
    (syn.) 曲屎
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）