décrucifier

An extremely rare verb meaning to take down from a cross, the reverse of crucifier — found almost exclusively in religious, art-historical, or literary writing about depositions from the cross.

• Le tableau montre le moment où l'on décrucifie le Christ. — The painting shows the moment Christ is taken down from the cross.
• Le texte décrit comment le corps fut décrucifié à la hâte. — The text describes how the body was hastily taken down from the cross.
• Ce détail de la fresque représente la scène où il est décrucifié. — This detail of the fresco depicts the scene where he is taken down from the cross.

So rare that it's essentially confined to art-historical or theological description of the Deposition — a learner will almost never need to produce it themselves.