{yIntagh} [...]
was explained in KCD itself:
"This is one of a number of Klingon curses that doesn't have an adequate translation."
If yIntagh does not have an adequate translation, this
suggests that the translation of the curse word is not life-support
system, despite attempts to wrangle a curse out of that
meaning. The words are homophones, not the same word.
-- SuStel http://trimboli.name