English

declassify

From de- + classify.

A compound of de- + classify

Latin dē ‘of; from’

English de-

Proto-Indo-European *kelh₁- ‘to call, shout’

…

Proto-Italic *klāssis

Latin classis ‘any one of the five divisions into which…’

French classe ‘class, type, group’

French classifier ‘to classify’

Today it means

verb to remove the classification from; to lift the restrictions on

Language periods are conventional ranges, not dates for this word.

Etymograph / declassify