Quiz: Remember the definition of mal de mer?
c.1400, earlier as a verb (early 14c.), now obsolete, meaning "to moisten," used of mists, dews, etc. Perhaps from Scandinavian (cf. Swedish dank "moist place," dänka "to moisten") or German (cf. Middle High German damph, Dutch damp "vapor"). Now largely superseded by damp (adj.). Related: Dankness.