휴식하다(hyu-sik-ha-da, hyusikhada)
Refers to formal, planned rest or recharging.
When to use
formal rest, post-exercise recharge, work break
The nuance
휴식하다 is used mainly in formal contexts or when resting intentionally for a set period, such as taking a break at work or after exercise.
쉬다(swi-da, swida)
Used for natural, everyday resting or relieving fatigue of body or mind.
When to use
everyday rest, spontaneous pause, figurative use
The nuance
쉬다 is used for spontaneous or informal resting in daily life, including figurative uses like voice resting when hoarse.