行かないうちに

before going; before getting far

→ 行く
phrase Rare #39,189
before going; before getting far The pattern ないうちに means “before” something happens or while it has not happened yet. With 行く, the exact meaning depends on context; it can mean before someone has gone very far.
JA: あまり遠くに行かないうちに夕立にあった。
EN: Before I had gone very far, I got caught in a sudden shower.

あまり遠くに行かないうちに夕立にあった。

I got caught in a sudden shower before I got very far.

あまり遠くへ行かないうちに、私は彼に会った。

I met him before I had gone very far.

私たちがあまり遠くに行かないうちに雨が降り出した。

It started raining before we got very far.