It forms all or part of: ascribe; ascription; circumscribe; conscript; conscription; describe; description; festschrift; inscribe; inscription; manuscript; postscript; prescribe; prescription; proscribe; sans-serif; scribble; scribe; script; scriptorium; scripture; scrivener; serif; shrift; shrive; subscribe; superscribe; superscript; transcribe; scarification; scarify.
It is the hypothetical source of/evidence for its existence is provided by: Greek skariphasthai "to scratch an outline, sketch;" Latin scribere "to write" (to carve marks in wood, stone, clay, etc.); Lettish skripat "scratch, write;" Old Norse hrifa "scratch."
1590s, "action of adding in writing;" c. 1600, "attribution of authorship or origin," from Latin ascriptionem (nominative ascriptio) "an addition in writing," noun of action from past-participle stem of ascribere "to write in, add to in a writing; impute, attribute," from ad "to" (see ad-) + scribere "to write" (from PIE root *skribh- "to cut").
1580s, "address or direction on a letter," from French superscript, from Latin superscriptus "written above," past participle of superscribere "write over or above something (as a correction)," from super "above" (see super-) + scribere "to write" (from PIE root *skribh- "to cut"). Meaning "number or letter written above something" first recorded 1901.