5 adjectives to describe plungings

This made violent plunging in a rough sea.

The enclosed area is flagged with stone, and in the centre is a tank, or pool, of water, in which the bear makes occasional plungings.

The reckless plunging ceased so far as it was against him.

Above the steady plunging of their own horse-hoofs they could hear the quicker irregular beat of other hoofs in the darkness before them.

West, bracing himself to the sudden plunging, managed to reach the rail.

5 adjectives to describe  plungings