rolling, rumbling, roll (of thunder)
shallows, riffle, shoal, sandbar
shallows, peals, rolls
Лодка застряла на мелководье возле берега.
The boat got stuck in the shallows near the shore.
Дети играли на мелководье реки.
The children were playing in the shallows of the river.
В лоции указаны все опасные мели.
All the dangerous shallows are marked in the sailing directions.
