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Jyutping tau3 sam1 loeng4
Pinyin tòu xīn liáng

Definitions (CC-CANTO)
  1. feeling cool from inside
Definitions (粵典–words.hk)
  1. 形容詞
    感到​涼爽​,​心情​亦​隨之舒暢
    to feel cool and then refreshed
    • 做完運動飲杯汽水,真係透心涼。
      做完运动饮杯汽水,真系透心凉。
      zou6 jyun4 wan6 dung6 jam2 bui1 hei3 seoi2, zan1 hai6 tau3 sam1 loeng4.
      It's really cool and refreshing to have a soft drink after doing sports.
Definitions (Wiktionary)
  1. verb, Taiwanese-Hokkien, figuratively
    extremely cold
Definitions (Kaifangcidian)
  1. 寒心
  2. 非常失望
Examples (粵典–words.hk)
  1. Cantonese
    做完运动饮杯汽水,真系透心凉。
    做完運動飲杯汽水,真係透心涼。
    zou6 jyun4 wan6 dung6 jam2 bui1 hei3 seoi2, zan1 hai6 tau3 sam1 loeng4.
    • It's really cool and refreshing to have a soft drink after doing sports.