the.com/glassy

the look that says nobody's home but the lights are still on

means Describing eyes or a surface that are smooth, shiny, and expressionless — clear and reflective like glass, often signaling vacancy, shock, or exhaustion.

from From "glass" plus the adjective ending "-y." "Glass" descends from Old English glæs, the same word for the material, with cousins across the Germanic languages (German Glas, Dutch glas). The root is thought to be related to an ancient color-word for something gleaming or amber-pale — so "glassy" carries that old sense of shining, transparent stillness, which is exactly why a lifeless, staring eye gets the name.

eye giveaway
Glassy eyes signal fever, tears, or too many drinks
poker term
Smooth water surfaces are called glassy by sailors
material trick
Volcanic obsidian is natural glass with no crystals
sound word
Glassy describes brittle, ringing tones in music
for instance

glassy-winged sharpshooter — invasive insect species found in california vineyards since 1990s, transmits deadly plant disease

lake baikal — world's deepest lake in siberia with 23,615 meters depth and extraordinarily clear, glassy water

death valley salt flats — expansive mineral plains in california that appear smooth and glassy, especially after rare rainfall

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