This is the 9678th most frequent Turkish word.
ansızın
Suddenly; unexpectedly.
Here, 'ansızın' functions as an adverbial phrase conveying 'sudden action'.
Ansızın kapıda belirdi.
Suddenly, he appeared at the door.
In this case, 'ansızın' emphasizes the unexpected onset of rain.
Ansızın yağmur yağmaya başladı.
Suddenly, it started to rain.
Here, 'ansızın' highlights an action or decision that occurred without warning.