싶다(sip-da, sipda)
Expression of subjective and emotional desire
When to use
personal desire, emotion-centered hope, spontaneous wish
The nuance
싶다 is used to express the speaker's internal wishes or hopes. It attaches to verb stems and emphasizes feelings or emotions.
원하다(won-ha-da, wonhada)
Expression of objective and concrete wishes or demands
When to use
clear demand, formal situations, objective wish
The nuance
원하다 is used to express clear and concrete wishes or demands, often with nouns. It carries a formal and rational nuance.