flounder
Definitions
To struggle or stagger helplessly or clumsily in water or mud.
To be in serious difficulty or to experience great confusion while attempting to do something.
A flatfish that is widely used as food.
Examples
The inexperienced swimmer began to flounder in the deep end of the pool.
Without a clear strategy, the company continued to flounder in a competitive market.
He watched the fish flounder on the deck after being pulled from the water.