This is the 805th most frequent Polish word.
nagle
"Suddenly"
Here, 'nagle' describes the sudden nature of the speaker's observation.
Nagle zobaczyłem coś dziwnego w ogrodzie.
Suddenly, I saw something strange in the garden.
The use of 'nagle' here highlights the unexpectedness of the phone ringing.
Rozmawialiśmy spokojnie, kiedy nagle telefon zadzwonił.
We were talking calmly when suddenly the phone rang.
In this sentence, 'nagle' emphasizes the abrupt transition to quietness.