[いわずもがなのこと, iwazumogananokoto] (exp, n) (1) something that goes without saying; something that needn't be said; (2) something that should rather be left unsaid
[いわでものこと, iwademonokoto] (exp, n) (1) something that goes without saying; something that needn't be said; (2) something that should rather be left unsaid