unfenced

Short definition from Wiktionary

Adjective

1. 1
   Not fenced: Not enclosed by a fence and thus free to roam over a wider area.
2. 2
   Not fenced: Not enclosed by a fence and thus more easily approachable, visitable, encroachable, attackable, and so on.
3. 3
   Not fenced: Without protection.

Verb

1. 1
   simple past and past participle of unfence