쉽다(swip-da, swipda)
Used when something is simple or feels effortless
When to use
Simple everyday tasks, Effortless learning or exams, Simple instructions or methods, Tasks for skilled people
The nuance
쉽다 is used when a task or situation is simple and not burdensome to understand or accomplish, typically in positive contexts.
어렵다(eo-ryeop-da, eoryeopda)
Used when something feels complex or difficult
When to use
Complex problem solving, Difficult exams or learning, Hard-to-understand explanations, Tasks for unskilled people
The nuance
어렵다 is used when a task or situation is complex, hard to understand, or burdensome to accomplish, usually in negative contexts.