deperm

[ dee-purm ]
/ diˈpɜrm /

verb (used with object) Nautical.

to reduce the permanent magnetism of (a vessel) by wrapping an electric cable around it vertically athwartships and energizing the cable.

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Origin of deperm

First recorded in 1945–50; de- + perm(anent)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020