the.com/expanding
What things do when they refuse to stay the size you agreed to.
means Growing larger in size, scope, or extent, or stretching outward in all directions.
from From Latin expandere, to spread out, where pandere means to spread the hands wide open.
Cosmic scaleThe universe itself is expanding, faster every moment.
Heat physicsMost materials expand when heated, contract when cooled.
Gas behaviorGases expand to fill whatever container traps them.