interpolate

The Century Dictionary: The Encyelopedic Lexicon of the English Language · 1887 · p. 494

(in-tér’pd-lat), v. ¢t.; pret. and pp. interpolated, ppr. interpolating. [« lL. inter pol at us, pp. of inter pol are (> It. inter pol are = Sp. Pe. Pr. interpolar = F. inter poler), polish, furpish, or dre up, corrupt, interpolate ance, falsified,