anidiomatical

From an- +‎ idiomatical.

anidiomatical (comparative more anidiomatical, superlative most anidiomatical)

1. (archaic) Not idiomatic.
   • 1828, Walter Savage Landor, Imaginary Conversations of Literary Men and Statesmen, volume III, London: Henry Colburn, […], →OCLC:

     Because you would not say two times; it is anidiomatical. JOHNSON: Anidiomatical! TOOKE: We want the word; take it from me. It is not so, when or three comes between. JOHNSON: I should rather say twice or thrice.

“anidiomatical”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.