the.com/tread

The grip between you and gravity, quietly negotiating every step you take for granted.

means To set your foot down and walk, step, or press upon something — or the part of a shoe or tire that meets the ground.

from From Old English 'tredan,' to step or trample, with Germanic kin like Dutch 'treden' and German 'treten.' The same root walks through 'treadmill' and 'trodden,' and the ground-gripping sense of a tire's or shoe's 'tread' came later, naming the part that does the actual treading.

first treads
Tires were smooth until grooves cut hydroplaning
legal minimum
Most countries require 1.6mm or you fail inspection
penny test
Lincoln's head vanishing means your tires are dead
snake symbol
Don't tread on me coiled a rattlesnake's warning
word origin
Old English meaning to step, stamp, or trample
for instance

tread water — swimming technique to stay afloat vertically without moving forward, taught in lifeguard training

tire tread — grooved pattern on vehicle tires that channels water and prevents hydroplaning on wet roads

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