Wiktionary
untimbered
a. Not timbered.
WordNet
untimbered
adj. lacking timbers; "an untimbered boat" [ant: timbered]
without trees; "an untimbered area"
Usage examples of "untimbered".
But overhead, the sky was of a brilliant blue, and here the breeze, though warm at mid-day, beating against the mountain through the moist belt of scrub which sloped down below the untimbered space at the foot of the precipice, was laden with pleasant odours.