Use offensive language (5)
I believe the answer is:
swear
(Other definitions for swear that I've seen before include "Use indecent or blasphemous language" , "Affirm" , "Use bad language" , "Asseverate" , "Assert" .)
I believe the answer is:
swear
(Other definitions for swear that I've seen before include "Use indecent or blasphemous language" , "Affirm" , "Use bad language" , "Asseverate" , "Assert" .)