changeable

Etymology

From Old French changeable.

adj

1. Capable of being changed.
2. Subject to sudden or frequent changes.
   The weather is very changeable today: we've had bright sunshine, clouds, wind and rain in the same half-hour.
   There will be no problems with visibility, or the highly changeable Highland weather, as Scotland basks in what is reported to be the country's hottest September day for more than a century. October 20 2021, Paul Stephen, “Leisure and Pleasure on the Far North Line”, in RAIL, number 942, page 48
3. (of a species) Capable of camouflaging itself by changing colour.