빨래하다(ppal-rae-ha-da, ppalraehada)
Casual expression for washing clothes or fabrics by hand or simple methods
When to use
hand washing at home, casual conversation, simple laundry
The nuance
빨래하다 is mainly used for hand-washing clothes at home or simple washing, natural in everyday conversation.
세탁하다(se-tak-ha-da, setakhada)
Formal and broad term for laundry including machine washing or professional cleaning
When to use
using washing machine, professional laundry, formal contexts
The nuance
세탁하다 is mainly used in formal or broad contexts like using washing machines or professional laundry services.