This is the 2166th most frequent Russian word.
вернутся
"Вернуться" means "to return" in English.
The word 'вернутся' is used in the context of expressing that the subjects will come back to their home in the future.
Они вернутся домой вечером.
They will return home in the evening.
Here, 'вернётся' is used in a question to ponder whether the person will return at some point in the future.
Ты думаешь, он когда-нибудь вернётся?
Do you think he will ever return?
In this conditional sentence, 'вернутся' describes the action of returning that is hoped to occur in the subsequent year.