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pure

/pjʊr/

Free from contamination, flaws, or moral corruption

From Latin, via Old French pure (Clean).

adjective
noun
verb
adverb
pure
Proto-Indo-European
Verified
*peue- / *pewH-
reconstructed
Reconstructed root meaning “to purify, cleanse.”

from PIE root *peue- "to purify, cleanse" (source also of Latin putus "clear, pure;" Sanskrit pavate "purifies,...

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Latin
Verified
pūrus
“Clean, clear, unmixed, unadorned, chaste.”

from Old French pur "pure, simple, absolute, unalloyed," figuratively "simple, sheer, mere" (12c.)

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Old French
Verified
pur
“Pure, simple, absolute, unalloyed”; also “sheer” or “mere.”

from Old French pur "pure, simple, absolute, unalloyed," figuratively "simple, sheer, mere" (12c.)

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Middle English
Verified
pure, pur
Borrowed from French and gradually displaced native terms such as lutter and scīr.

from Old French pur "pure, simple, absolute, unalloyed," figuratively "simple, sheer, mere" (12c.)

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Modern English
pure

Picture a medieval goldsmith holding up a piece of metal and judging whether it is truly unalloyed: that practical sense is where pure first appears in English around the mid-13th century. It arrived through Old French pur from Latin pūrus, carrying both physical cleanliness and the more delicate idea of being undefiled. English already had words such as Old English hlūtor, “clear” or “pure,” but pure gradually pushed them aside—a linguistic takeover conducted without a single battlefield. Its cleansing ancestry also surfaces in purge and castigate, whose original logic was to “make pure,” even if the later method involved punishment; pious may be a cousin too, though scholars dispute that connection. By 1872, mathematicians and musicians were using pure for exactness and perfection, so a word that began with clean metal now describes everything from a pure tone to a pure mathematical relationship.

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