[ foun-der-uh s ]
/ ˈfaʊn dər əs /
likely to cause foundering; miry; swampy.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for founderous
The road rose steeply; it was loose and founderous from heavy rain; great stones lay about, dangerous traps for a careless rider.Sophy of Kravonia|Anthony Hope
I have travelled through the negotiation,—and a sad, founderous road it is.