Wiktionary
a. (qualifier: of a body of water) unable to be forded
Usage examples of "unfordable".
The town was upon the banks of the great Saale River, broad and unfordable, which would serve well as a barrier to defend.
Orange and the Caledon Rivers sometimes remained unfordable for weeks together.
Chakdara holds the passage of the Swat River--a rapid, broad, and at most seasons of the year an unfordable torrent.
As the river was then in full flood and unfordable, the only road to Chakdara lay over or through the spur.
Zadorra, an unfordable river running from the town down the plain, and dropping out of it through a pass in the Puebla Heights to the south, just beneath our point of observation--that is to say, toward the wrist of the supposed hand.
I had never counted the rivers and if an unfordable one had barred my path it was no great hardship to camp for a few hours until the level dropped.
For at that moment came the bursting of the Barrington dam, which drowned two of the Avelard troopers, and put an unfordable width of water between him and the farther bank.
So energetically do we pursue this aim that after crossing an unfordable river we burn the bridges to separate ourselves from our enemy, who at the moment is not Bonaparte but Buxhowden.
As I knew we could not take the wagons beyond a certain point where there was a river called the Luba, unfordable by anything on wheels, I requested him, moreover, to send a hundred bearers with whatever escort might be necessary, to meet us on the banks of that river at a spot which was known to both of us.
Contades, with thirty thousand men, had taken up an unassailable position: his right wing on the Weser, and his left on impassable bogs and quagmires, and with his front covered by the Bastau, a deep and unfordable brook.
Warwick Creek which he dammed up to make it unfordable, and erected batteries to guard the dams.
She has hobbled across town, over the unfordable expressway lanes on foot, one already dead.
Just keep riding toward some distant horizon behind which the Comanche and the Kansans and the unfordable rivers lay.
Soon after the other party returned and reported that there was an unfordable river flowing into the upper end of the lake.
The recent rains had swollen the Potomac to such a degree as to render it unfordable, and, as the pontoon near Williamsport had been destroyed by the Federal cavalry, Lee was brought to bay on the north bank of the river, where, on the 12th, as we have said, General Meade found him in line of battle.