ethereal

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The Word of the Day for March 7 is:

ethereal   \ih-THEER-ee-ul (TH as in "think")\   adjective
    *1 : celestial, heavenly 
     2 : exceptionally delicate : airy, dainty 

Example sentence:
     That evening, John and Courtney relaxed on the deck of 
their chartered sloop, gazing up at the starry, ethereal 
firmament.

Did you know? 
     If you're burning to know the history of "ethereal," you're 
in the right spirit to fully understand that word's etymology. 
The ancients believed that the Earth was composed of earth, air, 
fire, and water, but that the heavens and its denizens were made 
of a purer, less tangible substance known as either "ether" 
or "quintessence." Ether was often described as an invisible 
light or fire, and its name derives from the Greek "aithein," a 
verb meaning "to ignite" or "to blaze." When "ethereal," the 
adjective kin of "ether," debuted in English in the 1500s, it 
referred specifically to regions beyond the Earth, but it 
gradually came to refer to anything heavenly, spiritual, or 
intangible. 

*Indicates the sense illustrated in the example sentence.