Sugkalupto describes something kept concealed, though Luke 12:2 says it will be revealed.

The attested use describes something in a concealed state, set in Luke 12:2 against its eventual revelation and being known.

1. Being in a concealed state · dominant

   In Luke 12:2, the perfect passive participle appears in the statement that nothing in this concealed condition will fail to be revealed; the APB renders the clause, "Nothing that is concealed will fail to be revealed."

   Luke 12:2

In the Anselm Project Bible: In Luke 12:2, the APB presents the clause with "concealed" and contrasts it with being "revealed." This indicates the verse's presentation rather than a precise word-for-word rendering.