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Jyutping ding6 sam1 jyun2
Pinyin dìng xīn wán

Definitions (CC-CEDICT)
  1. tranquilizer
  2. sth that sets one's mind at ease
Definitions (粵典–words.hk)
  1. 名詞
    令人​安心​嘅​承​諾​或者​措施​(​量​詞​:​粒​)
    something that helps to set one's mind at ease; literally: fix heart pill
    • 佢為員工大派定心丸,承諾今年一定唔會裁員。
      佢为员工大派定心丸,承诺今年一定唔会裁员。
      keoi5 wai6 jyun4 gung1 daai6 paai4 ding6 sam1 jyun2, sing4 nok6 gam1 nin2 jat1 ding6 m4 wui5 coi4 jyun4.
      He set the minds of his staff at ease by making a promise that there would be no sackings this year.
Definitions (Wiktionary)
  1. noun, figuratively
    something that provides reassurance; something that sets one's mind at ease
  2. noun
    pill that settle's one's mind or reduces anxiety; tranquilizer
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #898
Examples (粵典–words.hk)
  1. Cantonese
    佢为员工大派定心丸,承诺今年一定唔会裁员。
    佢為員工大派定心丸,承諾今年一定唔會裁員。
    keoi5 wai6 jyun4 gung1 daai6 paai4 ding6 sam1 jyun2, sing4 nok6 gam1 nin2 jat1 ding6 m4 wui5 coi4 jyun4.
    • He set the minds of his staff at ease by making a promise that there would be no sackings this year.