What is the meaning of the urdu words Kushtni and Guftni which have been taken from a poem of Faiz which goes like - Udhar ek harf ki kushtni yahan laakh uzr thaa guftni?

Answer 1

I was told kushtni means 'fit for slaughter' or 'to die for'

yahan hazaar uzr tha guftni, means, '(while) here lakh excuses were apt'

Let me know if someone said it better because I'm not perfect either.