This is the 2631st most frequent Russian word.
украли
"Украли" means "stole" or "have stolen."
The past tense verb 'украли' indicates that a theft occurred, involving a third party taking something.
У него украли часы.
His watch was stolen.
Uses 'украли' to describe an event involving the theft of an object belonging to 'them' as mentioned.
Она сказала, что у них украли машину.
She said that their car was stolen.
Uses 'украли' in a question to inquire about the reason for someone believing in theft concerning the speaker's belongings.