BALLAST

Any heavy material used to stabilize a ship or airship.

An electrical device for starting and regulating fluorescent and discharge lamps.

A resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations).

An attribute that tends to give stability in character and morals; something that steadies the mind or feelings.

Coarse gravel laid to form a bed for streets and railroads.

Make steady with a ballast.

WordNet

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