(a.) Not permanent.

able to adapt adaptable adjustable alterable alterative brittle capricious changeable checkered corruptible deciduous dying ephemeral evanescent ever-changing fading fickle fleeting flexible flitting fluid fly-by-night flying fragile frail fugacious fugitive impetuous impulsive inconstant insubstantial kaleidoscopic malleable many-sided metamorphic mobile modifiable momentary mortal movable mutable nondurable nonpermanent nonuniform passing perishable permutable plastic protean proteiform resilient rubbery short-lived supple temporal temporary transient transitive transitory undurable unenduring unstable variable volatile