The Collaborative International Dictionary
Untread \Un*tread"\, v. t. [1st pref. un- + tread.]
To tread back; to retrace.
--Shak.
Wiktionary
vb. (context transitive English) To retread (one's steps) in the opposite direction; to walk back.
Usage examples of "untread".
I passed sorcerers with machetes that crackled with flames in the morning light, making sacrifices at dawn of red cocks, who poured gnomic chants on the untrodden roads.
That seething, half-luminous cloud background held ineffable suggestions of a vague, ethereal beyondness far more than terrestrially spatial, and gave appalling reminders of the utter remoteness, separateness, desolation, and aeon-long death of this untrodden and unfathomed austral world.
The nature of the ancient forest, its quiet and untrodden silence, adheres to the site.
This only canker-frets my soul: that days go by, and months, and Witchland beateth down all peoples under him, and yet he suffereth the crown of pride, these rebels of Demonland, to go yet untrodden under feet.
He found a box of liver pills, a bottle of Jamaica ginger, and some iodine--not an encouraging array for a man fifteen miles of untrodden snow from the nearest human habitation.
And soon the catacomb divided and redivided before him, so that he must choose his way at random, not knowing whether it would lead him back to Ummaos or into the untrod depths.
All were ungovernably excited by the novelty of their position, and were aware of a terrible disquietude, a wild nervousness due to the shock of being plunged among alien atmospheric and geologic forces, the magnetic emanations of a soil untrod by human foot.