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Jyutping seoi2 dai2
Pinyin shuǐ dǐ

Definitions (CC-CEDICT)
  1. the bottom of a body of water
Definitions (Wiktionary)
  1. noun
    bottom or bed of a body of water
Examples (粵典–words.hk)
  1. Cantonese
    眛落水底捉蚬
    眛落水底捉蜆
    mei6 lok6 seoi2 dai2 zuk1 hin2
    • to submerge to the sea bed to catch mussels
  2. Cantonese
    水底考古
    水底考古
    seoi2 dai2 haau2 gu2
    • underwater archaeological research
  3. Cantonese
    佢潜落水底欣赏珊瑚。
    佢潛落水底欣賞珊瑚。
    keoi5 cim4 lok6 seoi2 dai2 jan1 soeng2 saan1 wu4.
    • He dives to enjoy the view of coral.
Examples (Wiktionary)
  1. Cantonese
    我顶泳帽沉咗落水底。
    我顶泳帽沉咗落水底。
    ngo5 deng2 wing6 mou2 cam4 zo2 lok6 seoi2 dai2.
    • My swimming cap sank to the bottom of the pool.