the.com/solid

the state where atoms hold formation like soldiers who never got the retreat order

means Firm and stable in shape, keeping its form rather than flowing or scattering — by extension, dependable, well-made, or unbroken.

from From Latin 'solidus,' meaning firm, whole, dense, or complete — the same word that named a sturdy Roman gold coin (the 'solidus,' ancestor of the Italian 'soldo' and even the British 'shilling' abbreviation 's.'). It reached English through Old French 'solide.' The sense of 'reliable' or 'a solid friend' is a natural figurative stretch: something whole and unshakeable, with no gaps to give way.

not still
Atoms vibrate constantly, just locked in place
glass cheats
Technically an amorphous solid, structurally a frozen liquid
diamond bluffs
Hardest natural solid, yet burns into pure gas
slang badge
Means utterly reliable, because solids do not flinch
states club
One of matter's classic trio with liquid and gas
for instance

diamond — carbon atoms arranged in crystal lattice, hardest natural material on earth

granite — igneous rock forming mountains like mount everest, 99% of earth's crust is solid rock

iron core — earth's inner core remains solid despite 9,000°f temperatures due to immense pressure

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