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Jyutping kaa1
Pinyin

Definitions (Wiktionary)
  1. character
    Used in onomatopoeia and transcriptions.
Definitions (Unihan)
  1. used in translation
  2. Cangjie Input
    RYMY

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Jyutping kaa4
Pinyin

Definitions (CC-CANTO)
  1. (used as phonetic "ka")/onomatopedia for 'click' or 'clack'/used to transliterate chemical terms

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Jyutping kaa1
Pinyin

Definitions (CC-CEDICT)
  1. (used as phonetic "ka")
Definitions (CC-CANTO)
  1. (used as phonetic "ka")/onomatopedia for 'click' or 'clack'/used to transliterate chemical terms
Definitions (Wiktionary)
  1. character
    Used in onomatopoeia and transcriptions.
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    门咔哒一声关上了。
    門咔噠一聲關上了。
    mén kā dá yī shēng guān shàng le 。
    • The door clicked shut.