founderous adjective.
['faʊnd(ǝ)rǝs] Chiefly
dial. &
Law. Also
foundrous.
L17.[from FOUNDER verb + -OUS.]Causing a person or horse to founder; miry, full of potholes.
■ S. Weyman The road was deep and foundrous, and..I was obliged to leave it..to pass the worst places. [TahlilGaran] English Dictionary ▲