They swim in the pool joyfully.
Meaning: This means that they are moving their bodies through the water while having fun.
Choice of Words: The word swim refers to the act of propelling oneself through water using one's limbs, pool is a body of water designed for swimming, and joyfully describes a state of happiness and delight. Together, they convey the idea of enjoying a recreational activity in the water.
Alternative Expressions
Related Expressions