off-road
Concise Oxford English Dictionary © 2008 Oxford University Press:
off-road
▶adverb away from the road; on rough terrain. ▶adjective denoting a vehicle or bicycle for use off-road.
– derivatives
off-roader noun,
off-roading noun.
off-roader noun,
off-roading noun.
'off-road' also found in these Oxford entries:

