depono

Depono, deponere, deposui, depositum is de plus pono, third conjugation, and it inherits pono's odd perfect stem posu- rather than anything you could guess from the present. The base sense is to set something down and leave it there, which fans out in every direction Latin needs: lay down arms, lay aside anger, deposit money or a pledge with someone, and lay a body to rest.

In this corpus the church senses dominate. Deponere is the standard verb for removing a cleric from office, which is why depositio means both a burial and a deposition from rank - the same word, two solemn kinds of putting down. English deposit, depose, deposition and deponent all come through it; the grammarians' "deponent verb" is one that has laid aside its passive meaning.