unimpaired

adj

Etymology: Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English impaired English unimpaired From un- + impaired.

1. Not impaired.

   “While the United States remained a non-belligerent speeds continued unimpaired, despite the increasingly dense occupation of main-line tracks, but the entry of the U.S.A. into the war in December, 1941, made its effect felt almost immediately.”