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Jyutping sam1 sai3
Pinyin xīn xì

Definitions (CC-CEDICT)
  1. careful
  2. scrupulous
Definitions (Wiktionary)
  1. adj
    careful; scrupulous
    (syn.) 细心, 細心
    • 膽大心細
      胆大心细
      dǎn dà xīn xì
      bold but cautious
  2. adj
    oversensitive; suspicious
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (粵典–words.hk)
  1. Cantonese
    佢心大心细唔知拣乜嘢好。
    佢心大心細唔知揀乜嘢好。
    keoi5 sam1 daai6 sam1 sai3 m4 zi1 gaan2 mat1 je5 hou2.
    • He's so indecisive on what to choose.
Examples (Wiktionary)
  1. Mandarin
    帐务由心细的李小姐经手,绝对不会出错。
    帳務由心細的李小姐經手,絕對不會出錯。
    zhàng wù yóu xīn xì de lǐ xiǎo jiě jīng shǒu , jué duì bù huì chū cuò .
    • The accounting is carefully handled by Miss Li; absolutely no mistakes are made.
  2. Mandarin
    胆大心细
    膽大心細
    dǎn dà xīn xì
    • bold but cautious