You searched for: “dune
doom, dune
doom (DOOM) (noun)
Inevitable destruction or ruin: Jayne had a sense of doom when she lost her passport.
dune (DOON, DYOON) (noun)
A hill or ridge of wind-blown sand: Hal and Jack climbed the dune at the edge of the desert to scan the vastness of the land before them.

If the storm blowing sand off the dune lasts very long, Devon is afraid it will doom his plans to cross the desert on camel back.