expression, adverb
in no way; by no means; no matter what
Used almost exclusively in the negative pattern にっちもさっちも行かない (or いかない) to mean 'stuck', 'at an impasse', or 'unable to proceed'. The standalone adverbial use is rare.
See also: 二進も三進も行かない (にっちもさっちもいかない)
この問題はにっちもさっちも行かなくなった。
This problem has reached a complete impasse.
にっちもさっちもいかない状況だ。
It's a situation where there's no way out.