Synchronisiertet
Synchronisiertet is a form of the German verb synchronisieren, used as the simple past (Präteritum) second-person plural. It means "you all synchronized" or "you all did synchronize." In standard written German, this explicit form is typically found with an explicit subject, as in: Ihr synchronisiertet die Uhren.
In everyday spoken German, the Perfekt is far more common for finite past actions, so one would
Morphology and related forms: synchronisiertet is the Präteritum ending for the second-person plural of the verb
Orthography and usage notes: In standard German, the pronoun ihr is typically used with this form: ihr
See also: Synchronisierung, synchronisieren, Präteritum, Perfekt.