prescribe (v.)

"to write down as a direction," mid-15c., from Latin praescribere "write before, prefix in writing; ordain, determine in advance," from prae "before" (see pre-) + scribere "to write" (from PIE root *skribh- "to cut"). Related: Prescribed; prescribing. Medical sense is from 1580s, probably a back formation from prescription.

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