irretraceable

== English == === Etymology === From ir- +‎ retraceable. === Adjective === irretraceable Not retraceable; unable to be retraced. === References === William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “irretraceable”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC. “irretraceable”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.