Idea

구상

gusang

(a conception in the mind of something to be done; a plan for doing something, an intention)

사상

sasang

(an image of an object that is formed in the mind or recalled by the memory)

생각

saenggak

(an image of an object that is formed in the mind or recalled by the memory)

아이디어

aidieo

(an image of an object that is formed in the mind or recalled by the memory)