[--]

Jyutping sei3 fong1 kaak1
Pinyin sì fāng kè

Definitions (Wiktionary)
  1. noun, Cantonese
    quadrilateral (usually rectangular)
    (syn.) 四邊形, 四方形, 四边形

[--]

Jyutping sei3 fong1 kwaak1
Pinyin sì fāng kè

Definitions (CC-CANTO)
  1. four-sided frame, square