noun
a light, thin, and insubstantial material or substance
adjective
of or resembling gossamer; very light, thin, and insubstantial
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The gossamery fabric of her gown shimmered in the sunlight.
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She wore a gossamery scarf that fluttered in the breeze.
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That gossamery top is so cute!
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The delicate gossamery nature of their relationship was easily shattered.