BACKFILL
Meaning of BACKFILL in English
/bak"fil'/ , n.
1. material used for refilling an excavation.
v.t.
2. to refill (an excavation).
[ 1950-55; BACK 2 + FILL ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012