the.com/ash cloud

A volcano's way of grounding every flight to remind you who's in charge.

means A dense plume of pulverized rock and glass hurled into the atmosphere by a volcanic eruption, capable of drifting for thousands of miles and choking jet engines along the way.

from Straightforward compound of 'ash' — from Old English 'æsce,' the residue of burning, going back to a very old Germanic root for fire's leftovers — and 'cloud,' from Old English 'clud,' which originally meant a mass of rock or a hill before it drifted (fittingly) into meaning a mass of vapor in the sky. The phrase itself is modern and plainly descriptive, not ancient — it entered everyday vocabulary largely through 20th- and 21st-century news coverage of eruptions disrupting air travel, the words simply doing their literal jobs together.

glass, not smoke
made of tiny shards of rock and glass, not soot
engine killer
melts inside jet turbines then resolidifies as glass
2010 chaos
Eyjafjallajokull grounded 100,000 flights across europe
name problem
nobody could pronounce the volcano that caused it
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