We have no meanings for "so impassable" in our records yet.
1 The roads have now become so impassable that ambulances with wounded men can no longer run between here and Fredericksburg.
2 This valley opened into the Dana gorge, which is here neither so narrow nor so impassable as at its opening into the plateau.
3 Yet that short distance was so impassable that, save for the more deadly fire, a quarter of a mile might have divided us.
4 So impassable did it then become that even men were compelled to engage the services of a cargador to carry them across "pickaback."
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