unfenced

un- +‎ fenced

unfenced (not comparable)

1. Not enclosed by a fence or other boundary; free to roam over a wider area.
   • 1858, The Journal of the Kilkenny and South-east of Ireland Archaeological Society:

     Ireland must have remained utterly unfenced and, therefore, uncultivated, for many a century; and the sparse tribes that inhabited the country must have principally subsisted venatically.

   • 1941 May, W. Dendy, “The Cyprus Government Railway”, in Railway Magazine, page 201:

     The line is unfenced, except in the vicinity of stations, and runs across the treeless Mesaorian plain for the whole distance between Famagusta and Nicosia.

   • 2023 January 11, Richard Foster, “British Rail's weirdest railways...: Wisbech & Upwell Tramway”, in RAIL, number 974, page 46:

     It was a rural railway that served the fertile Fens of Cambridgeshire and Norfolk. But because it flanked public roads and was unfenced (to save costs), it was deemed a tramway and its locomotives had to be fitted with a cowcatcher.

2. (figuratively) Without protection; defenseless.
   • 1662, Henry More, An Antidote Against Atheism, Book II, A Collection of Several Philosophical Writings of Dr. Henry More, p. 81:

     She [Nature] has made the hinder part of the Head, more strong, as being otherwise unfenced against falls and other casualties.

unfenced

1. simple past and past participle of unfence