釦 [𬬪]

Jyutping kau3
Pinyin kòu

Definitions (Unihan)
  1. button
  2. buckle, clasp
  3. engrave
  4. Cangjie Input - Traditional
    CR

釦 [扣]

Jyutping kau3
Pinyin kòu

Definitions (粵典–words.hk)
  1. 名詞
    即​係​衫​嘅​鈕​扣​（​量​詞​：​粒​）
    clip; buckle
Definitions (Wiktionary)
  1. character
    button (knob or small disc serving as a fastener)
  2. character
    to engrave; to decorate
  3. character
    metal loop at the nock point of a bow string

釦 [－]

Jyutping kau3
Pinyin kòu

Definitions (CC-CANTO)
  1. button/buckle/clasp

釦 [扣]

Jyutping
Pinyin kòu

Definitions (CC-CEDICT)
  1. button
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    有人轻轻扣了门。
    有人輕輕釦了門。
    yǒu rén qīng qīng kòu le mén 。
    • Someone knocked on the door.
  2. Mandarin
    扣子掉了。
    釦子掉了。
    kòu zi diào le 。
    • The button came off.
  3. Mandarin
    这件外套有扣子。
    這件外套有釦子。
    zhè jiàn wài tào yǒu kòu zi 。
    • This jacket's got buttons.