Numinous is a formal, often literary, word that typically describes things that have a mysterious or spiritual quality. It can also describe something holy or something that appeals to one's aesthetic sense.

// We were overcome by the numinous atmosphere of the catacombs.

// The artist's sculptures dominate the space, their numinous presence welcoming museum-goers to a foreign world.

To coruscate is to give off or reflect light in bright beams or flashes. Coruscate is used as a synonym of sparkle and may also be used to mean "to be brilliant or showy in technique or style."

// She placed a bid on a classic car from the 1950s, replete with yards of coruscating chrome.

Exorbitant describes something that goes far beyond what is fair, reasonable, or expected (as by being too high, too expensive, etc.).

// The cost of our stay was so exorbitant you would have thought that we had bought the hotel and not just spent a few nights there.

to consider or include something as part of a more comprehensive one

impassable

Something described as gossamer—such as a butterfly wing or a thin fabric—is very light or delicate.

// Except for a few gossamer clouds, the sky was clear and blue.

To fret is to worry or be concerned.

// I was sure we wouldn’t get there in time, but they told me not to fret.

Chthonic means "of or relating to the underworld." It is used as a synonym of infernal.

// Cleo compared entering her brother's basement bedroom to a descent into chthonic regions: it was dark and odd-smelling, and she was a little frightened of what she might find there.