Adjective
unmaintained (comparative more unmaintained, superlative most unmaintained)
Not maintained
As an aside, any time you get a flat tire or break an axle on an unmaintained road, I suggest you file a suit in Small Claims Court against Norquist personally for the cost of repairs. Source: Internet
Intrepid hikers and rock climbers can venture into the depths on several very steep, unmaintained trails. Source: Internet
Except where they are unmaintained and not usable even for pedestrians, I see no reason not to use them for bikes. Source: Internet
Exercise caution if you attempt to proceed down to the river on an unmaintained extension. Source: Internet
With only two paintings — Graywill’s painting of schizophrenia and another painting by a now-graduated student — hanging on the wall, the exhibit was left unmaintained. Source: Internet