The peril of traversing these plains is greatly increased by the movability of the sand and the Medanos.
also moveable, late 14c., "disposed to movement;" c.1400, "capable of being moved," from Old French movable, from moveir (see move (v.)). A moveable feast (early 15c.) is one in the Church calendar which, though always on the same day of the week, varies its date from year to year. Related: Movability.