衩 [－]

Jyutping caa1
Pinyin chǎ

Definitions (粵典–words.hk)
  1. 名詞
    衫​、​褲​、​裙下​便​嘅​開​口​（​量​詞​：​個​）
    the open seam of a clothing, e.g. a dress, a shirt or pants
    • 條裙太窄喇，你點行喎！不如我哋喺兩邊開個衩啦。
      条裙太窄喇，你点行㖞！不如我哋喺两边开个衩啦。
      tiu4 kwan4 taai3 zaak3 laa3, nei5 dim2 haang4 wo3! bat1 jyu4 ngo5 dei6 hai2 loeng5 bin1 hoi1 go3 caa1 laa1.
      The dress is too tight for you to walk. It would be better if we open some seams on both sides.

衩 [－]

Jyutping caa3
Pinyin chà

Definitions (CC-CEDICT)
  1. slit on either side of robe
Definitions (Wiktionary)
  1. character
    the open seam of a garment which allows freedom of movement
  2. character
    Used in 褲衩／裤衩 (kùchǎ).

衩 [－]

Jyutping caa3
Pinyin chǎ

Definitions (CC-CEDICT)
  1. open seam of a garment
  2. shorts
  3. panties
Definitions (Wiktionary)
  1. character
    Used in 褲衩／裤衩 (kùchǎ).
Definitions (Unihan)
  1. the open seam of a garment which allows freedom of movement
  2. Cangjie Input
    LEI
Examples (粵典–words.hk)
  1. Cantonese
    条裙太窄喇，你点行㖞！不如我哋喺两边开个衩啦。
    條裙太窄喇，你點行喎！不如我哋喺兩邊開個衩啦。
    tiu4 kwan4 taai3 zaak3 laa3, nei5 dim2 haang4 wo3! bat1 jyu4 ngo5 dei6 hai2 loeng5 bin1 hoi1 go3 caa1 laa1.
    • The dress is too tight for you to walk. It would be better if we open some seams on both sides.