the.com/sifter

a mesh-bottomed gatekeeper deciding which particles are worthy and which get clumped together in shame

means A tool with a mesh or perforated bottom used to separate fine particles from coarse ones, or a person or thing that examines material to sort out what's wanted.

from From the verb 'sift,' which descends from Old English 'siftan,' to pass through a sieve. It's a close kin of the word 'sieve' itself (Old English 'sife'), and shares deep roots with Dutch 'ziften' and German 'sieben' — all stemming from a Germanic family of words for separating the fine from the coarse. The '-er' is the plain old agent suffix, turning the act into the thing or person that does it.

ancient tech
Egyptians sifted grain with papyrus screens millennia ago
science cousin
Lab sieve stacks separate soil by exact particle size
gold rush
Prospectors sifted riverbeds chasing flecks of fortune
word root
From Old English siftan, to strain or examine
double life
Also slang for one who scrutinizes evidence carefully
for instance

okto sifter — german engineering company making industrial sifters since 1919, processes 2+ million tons annually

russell finex sifter — uk manufacturer of vibratory sifters, flagship model used in pharmaceutical and food industries worldwide

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