Refine this word faster

Squirrel cage

noun

Noun

1
A circular cage for a squirrel or other small animal, which rotates vertically as the animal runs at the bottom.
2
cage with a cylindrical framework that rotates as a small animal runs inside it wordnet
3
A tedious, repetitive, unfulfilling activity or situation, especially one in which no progress is achieved. broadly, figuratively
"The poor stuggle for riches, success, power; but those who achieve them die out. Life is, then a sort of squirrel cage or treadmill."
4
Any other device, such as a fan or rotor, that resembles a squirrel cage in form.
"A blower, in the shape of a drum fan (also called a "squirrel cage"), pulls the warm humid air from the room across the coils."

Unscramble this word: squirrelcage