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Demagnetise (Verb)

Erase (a magnetic storage device).

Verbs of telling, asking, ordering, singing.

The phone's factory reset would demagnetise the magnetic storage device to ensure all data was erased.
To demagnetise the hard drive, we'll need to use a degaussing tool to remove all magnetic fields.
The demagnetise function in the software deletes all data on the magnetic storage device.
It's essential to demagnetise the disk before disposing of it to prevent data breaches.
After demagnetising the storage device, it was completely blank and ready for reuse.

Make nonmagnetic; take away the magnetic properties (of); "demagnetize the iron shavings"; "they degaussed the ship".

Verbs of size, temperature change, intensifying, etc..

Magnetic residue on the blade can interfere with other electronics, so it's essential to demagnetise it after use.
The mechanic determined that the faulty compass needed to demagnetise before recalibration.
They demagnetise the metal objects in the vicinity to avoid interference with the measuring equipment.
Heat can demagnetise ferromagnetic materials, including those used in magnetic storage devices.
Regular maintenance involves demagnetise and then recalibrating the sensors to ensure precise readings.