Bad, in various senses (not always clearly distinguishable). Frequent in Middle English use; later… Difficult or dangerous; esp. of roads, passing…

Of ground or roads: Covered with a depth of mud, sand, or loose soil. Obsolete.

Marked by or full of ruts; characterized by many or pronounced ruts.

Of a road, etc.: broken, cut up, or marked with ruts. Also figurative.

Causing or likely to cause to founder; miry, full of ruts and holes.

Of the nature of a ditch; abounding in ditches or deep furrows.