A device, substance, or person that keeps something steady, balanced, or from changing rapidly.
From 'stable,' which comes from Latin 'stabilis' (standing firm). The suffix '-izer' was added to create a noun meaning something that performs the action of stabilizing.
Airplanes have tiny tail fin stabilizers that work constantly to keep them level—without them, the plane would flip and tumble like a falling pencil, so these little wings are literally lifesavers!
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