空想

Noun

 * 1) fantasy; dream

Verb

 * 1) to fantasize; to daydream

Adjective

 * 1)  utopian

Etymology
Ultimately from.

The sense of is first cited in Japanese to 1886, and probably reflects a  and  style of repurposing older terminology to translate unfamiliar Western concepts.

The Buddhist sense is older, and was borrowed into Japanese along with various Chinese Buddhist texts. This term is included in the, better known in English by its Chinese pronunciation, the , completed some time in the early 600s.

Noun

 * 1)  fantasy, daydream; something imagined
 * 2)   thought that exhibits attachment to sunyata

Verb

 * 1)  to fantasize
 * 2)   to think in a way that exhibits attachment to sunyata