An adverb used with a negative verb to mean 'not anywhere' or 'nowhere' (e.g., 'not go anywhere').
コロナの影響で去年はどこへも行けなかった。
Because of COVID, I couldn't go anywhere last year.
足をけがしてしまい、今はどこへも出かけられない。
I injured my leg, so I can't go anywhere right now.
その古い地図では道が消えていて、どこへも進めないように見えた。
On that old map the roads had disappeared and it looked like you couldn't go anywhere.