Something like the word 'antithesis', however instead of just meaning 'this is the opposite of that' I thought there was a word that meant 'doing this signals the death of this'.

I thought there was a word to describe this, but nothing comes to mind.

The meaning behind the phrase I'm thinking of is roughly 'if I accept to do this, it is the death of the purpose of my job'.

  • 1
    Do you require a word or longer expression? It's not clear. Mar 12 at 15:26
  • Are you talking about something like a Catch-22?
    – Joachim
    Jul 10 at 16:30

I suggest

The final nail in the coffin

an event that causes the failure of something that had already started to fail: This latest evidence could be the final nail in the coffin for Jackson's case.

[Cambridge Dictionary]

Or perhaps, the words below sound more appropriate in the context you've provided (Apologies, I read the example you have provided after giving my first answer).


to cause to be ineffective or invalid Alcohol can negate the effects of some medicines.


to oppose successfully : defeat the hopes or aspirations of

[Merriam-Webster Dictionary]

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