Not subjected to treatment, processing, or medical intervention. Refers to materials left in their natural state or medical conditions left unaddressed.
From prefix 'un-' (not) + 'treated' (past participle of treat), from Old French 'traitier' (to handle, deal with). The medical sense developed alongside modern healthcare practices.
The concept of 'untreated' reveals how much modern life depends on processing and intervention - from untreated water being unsafe to drink, to untreated wood being vulnerable to decay. It highlights the invisible infrastructure of treatment that surrounds us.
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