Eldritch

Eerie; weird; spooky

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During Halloween, Mrs. Smith told her students an eldritch story so that they could analyze the suspense that took place in it.

Rame

Something that's both chaotic and joyful at the same time

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Couldn't find a sentence example: also it has more than one meaning.

Ethereal

Extremely delicate and light in a way that seems not to be of this world.

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Her hair fell softly around her face and she had an ethereal glow about her.

Opulent

Expensive and luxurious

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It was the kind of place his brothers would love: opulent and openly displaying signs of wealth.

Selcouth

Unfamiliar, rare, strange, and yet marvelous

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But my heart quaketh, my hand is trembling when I write of this most selcouth thing.

Amorevolous

Loving

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He would leave it to the princess to show her cordial and amorevolous affections.

Gauche

Unsophisticated and socially awkward.

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So how do you let guests know where you registered without seeming gauche?

Moonstruck

Dreamily romantic or bemused

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At first glance of the fair maiden, the prince became moonstruck and dazed by her beauty.

Brumous

Gray skies and winter days, filled with heavy clouds or fog

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When I came upon the deli, its sign glowing like a beacon in the brumous night, a slight twinge of anticipation quickened my pace.

Idyllic

Extremely happily, peaceful, or picturesque

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Rosie's idyllic world came to an abrupt end when her parents' marriage broke up.

Forelsket

The euphoria you experience when you are first falling in love.

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No sentence for example; sorry.

Verdant

With plants and flowers in abundance

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Verdant forests stretched to the steely sky, a swath of green, brown, and grey.

Mellifluous

A sound that is sweet and smooth, pleasing to hear.

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We were so tired that even the constant rustling of leaves sounded mellifluous to us.

Arcane

Secret, mysterious, understood only by few.

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People always inquired why the identity of my grandfather was kept arcane.

Mendacious

Given to deception or falsehood

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I am always straightforward and honest, that I could not be mendacious even if I wanted to.

Solivagant

Wandering alone

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Not everyone likes to travel in groups, and so it is with solivagants.

Resplendent

Shining brightly

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 My house is not resplendent with ivory and gold; nor is it adorned with marble arches, resting on graceful columns brought from the quarries of distant Africa.