Providing a road with a newly smooth horizontal or sloping surface

Answer of Word Craze Providing a road with a newly smooth horizontal or sloping surface

This is a tricky question of Word Craze which last appeared on Level 1720. Meanings or answers can change from time to time with each game update if you noticed a change on the answer of this clue please do let us know by commenting below so we can fix it A.S.A.P.
The solution below is:

For other clue answers of Level 1720 Word Craze Level 1720 Answer open the the level link.