A.T. Robertson Commentary Ephesians 5:12

"for the things which are done by them in secret it is a shame even to speak of." — Ephesians 5:12 (ASV)

In secret (κρυφη). Old adverb, only here in N.T. Sin loves the dark.

Even to speak of (κα λεγειν). And yet one must sometimes speak out, turn on the light, even if to do so is disgraceful (αισχρον, like 1 Corinthians 11:6).