UNTREAD
Meaning of UNTREAD in English
/un tred"/ , v.t., untrod, untrodden or untrod, untreading .
to go back through in the same steps.
[ 1585-95; UN- 2 + TREAD ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012