How to pronounce 嚴禁 in Cantonese (2 out of 3):

嚴禁釣魚游水水流湍急
The fishing ban is on swimming.

Cantonese Sentence Breakdown

嚴禁 jim4 gam3
(verb) Strictly forbid
釣魚 diu3 jyu4
fishing
游水 jau4 seoi2
swimming
水流 seoi2 lau4
stream
湍急 tyun1 gap1
rapid (water)