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Jyutping zau3 sai6
Pinyin zhòu shì

Definitions (Wiktionary)
  1. verb, Hakka, Min-Nan
    to vow; to pledge; to swear
    (syn.) 罚咒, 发誓, 诅喙, 立誓, 賭誓, 賭咒, 盟誓, 赌誓, 宣誓, 詛喙, 赌咒, 咒喙, 起誓, 罰咒, 發誓, 矢誓, 誓言
  2. noun
    vow; pledge