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scale

/skeɪl/

Hard outer plate; also a measuring standard

From Proto-Indo-European skel (to cut).

noun
verb
skel
Proto-Indo-European
Verified
*skel-
reconstructed
to cut

from PIE root *skel- (1) "to cut." A prehistoric cognate of scale (n.2) "weighing instrument." In reference to humans,...

Proto-Germanic
Verified
*skæla
reconstructed
to split, divide

from Proto-Germanic *skæla "to split, divide" (source also of Dutch schaal "a scale, husk," Old High German scala...

Old French
Verified
escale
cup, shell pod, husk

from Old French escale "cup, scale, shell pod, husk" (12c., Modern French écale )

Middle English
Verified
scale
outer plate, husk, shell-like covering

from Old French escale "cup, scale, shell pod, husk" (12c., Modern French écale )

Modern English
scale

A fish’s armor and a bathroom measuring gadget are cousins, which feels like a joke the language has been carrying around for centuries. The original image behind this scale is something cut off and split away: a husk, a shell, a peeled-off little covering, all the way back to Proto-Indo-European *skel-, “to cut.” That makes it kin to words like shell, skull, and scurf, all of them whispering about surfaces, scraps, and things that come off in pieces. Then the Bible gives the word a dramatic cameo in Acts 9:18, where something like scales fall from Saul’s eyes when his blindness ends — a perfect image, because these scales are things that block vision until they don’t. The measuring-sense scale is a separate historical offshoot, but the old cutting-and-covering idea is the one that sticks in your head: language loves to turn a peeled skin into a unit, a diagram, or a fish’s armor.

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