The Greek adjective ekdēlos is an intensified form of dēlos (clear, evident) with the prefix ek- (out, thoroughly). Something ekdēlos is not merely visible but completely, plainly, undeniably evident — there is no room for doubt or misinterpretation.
Ekdēlos appears in 2 Timothy 3:9 in the context of false teachers: 'their folly will be clearly evident to everyone.' Paul's point is eschatological: what may be hidden temporarily will be exposed. This word reflects the biblical conviction that truth and falsehood, light and darkness, cannot remain hidden indefinitely. The Day of the Lord will make all things ekdēlos. This brings comfort to those who suffer under false teachers and warning to those who practice deception.