Etymology of the English word synchro
the English word synchro
derived from the English word synchronous
derived from the Late Latin word synchronus
derived from the Greek word sunchronos, σύνχρονος
using the Greek prefix sun-, συν-
derived from the Greek word sun, σύν (together; with or together ; by association, companionship, process, resemblance, possession, instrumentality, addition, etc.)
derived from the Greek word chronos, χρόνος (a space of time or interval; by extension, an individual opportunity; by implication, delay)