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Jyutping bou2 wan1
Pinyin bǎo wēn

Definitions (粵典–words.hk)
  1. 動詞
    減慢​變​凍​嘅​過​程​,​保持​一件​物品​嘅​温度​;​通常​用​於​食物​或​飲品
    to keep something warm, often referring to food or drinks
    • 保温瓶
      保温瓶
      bou2 wan1 ping4
      vacuum flask
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    这副手套帮她的手保温。
    這副手套幫她的手保温。
    zhè fù shǒu tào bāng tā de shǒu bǎo wēn 。
    • These gloves kept her hands warm.
Examples (粵典–words.hk)
  1. Cantonese
    呢个暖水壶用真空玻璃内胆,好保温㗎。
    呢個暖水壺用真空玻璃內膽,好保温㗎。
    ni1 go3 nyun5 seoi2 wu2 jung6 zan1 hung1 bo1 lei1 noi6 daam2, hou2 bou2 wan1 gaa3.
    • This thermal flask use vacuum glass inner chamber, really good at keeping warm.
  2. Cantonese
    保温瓶
    保温瓶
    bou2 wan1 ping4
    • vacuum flask