天井

Noun

 * 1) courtyard; patio
 * 2) atrium

Etymology
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From, in turn from. First cited in Old Japanese to a work from 759.

The word is literally spelled +, in reference to the way that ceiling beams were arranged in the shape of a wellhead. See also

Noun

 * 1)  ceiling
 * 2)  the highest place inside an object
 * 3)   the top price of something