to return to low level after a rise (in water level, price etc)
Definitions (粵典–words.hk)
動詞
上升咗之後返番落嚟;多數用嚟講一啲:例如好似價格或者水位咁嘅水平 (of index of price, water level) to fall after a rise
燃油價格經過十個月嘅高企之後終於開始回落。
燃油价格经过十个月嘅高企之后终于开始回落。
jin4 jau4 gaa3 gaak3 ging1 gwo3 sap6 go3 jyut6 ge3 gou1 kei5 zi1 hau6 zung1 jyu1 hoi1 ci2 wui4 lok6. The price of fuel oil has finally started to fall after being high for ten months.
Definitions (Wiktionary)
verb, of water levels, usually
to fall after a rise