With the unfruitful works of darkness,— It is well known that the word ακαρπος in Greek, and the word inutilis in Latin, are sometimes used to express not only unprofitable, but mischievous things; and this is undoubtedly the meaning of the word here. See Romans 1:28.
Related Commentaries of Ephesians 5:11
Ephesians 5:11
11 And have no fellowship with the unfruitful works of darkness, but rather reprove them.