Focus on the pronunciation of high-speed
English definition of “high-speed”
/ˌhaɪˈspiːd/ adjective [before noun]
› used to describe something that moves or operates very quickly: high-speed access/communication/transmission The 3G standard is designed to offer high-speed access and "always on" mobile Internet links. a high-speed computer/network High-speed rail between the two cities is still a long way from happening.