the word is nagryanuli
nagryanuli = (they) came suddenly
нагрянуть = nagryanut = (of smb or smth) to come unexpectedly/suddenly/without warning
Нагрянуть - to come suddenly; to attack
What is the context?
Which makes no sense
на (na-) + гря́нуть (grjánutʹ)
(colloquial) means to come unexpectedly
(colloquial) to break out, (cold) to strike
But my question is: in what context are you referring?
turn up out of the blue - нагрянуть
An example sentence:
К ним родственнички нагрянули.
It means they did not expected at all but their extended family arrived to their place indefinitely.
Well, Antonia, welcome to LT
But there is no need to make this a forum topic, you can just ask it in comments or PM
Mods, may you please mark this as SOLVED