IPA: /rɪˈstɑːrt/
KK: /riˈstɑrt/
To begin again after stopping or shutting down.
After the system crashed, I had to restart my computer.
Past: restarted
Past Participle: restarted
To start something again after it has stopped or been turned off.
I need to restart my computer to install the updates.
Past: restarted
Past Participle: restarted
Restart → It is formed from "re-" (meaning again) and "start" (from Old English "styrtan", meaning to leap up or begin). The word "restart" means to begin again or to start anew.
Think of starting something 'again' ('re-') — that's why restart means to begin anew.