쉬다(swi-da, swida)
To take a break or rest briefly in everyday situations to relieve fatigue or tension
When to use
casual conversation, break during exercise, short rest, relieving fatigue
The nuance
쉬다 is commonly used in spoken language and fits short breaks or brief pauses.
휴식하다(hyu-sik-ha-da, hyusikhada)
To take a rest in formal or official contexts, often implying a scheduled or regulated break
When to use
official reports, regulated workplace breaks, health care recommendations, legal rest periods
The nuance
휴식하다 is used in written or formal contexts and is appropriate for longer or planned rests.