godan verb (-ru)
finish giving orders; finish commanding
Used when someone has completed the act of issuing commands or instructions. Often appears in narrative or formal contexts.
隊長が命じ終わると、兵士たちはすぐに動き始めた。
When the captain finished giving orders, the soldiers immediately began to move.
命じる means 'to order' or 'to command'; 命じ終わる adds the completion aspect, meaning 'to finish ordering'.
Compound of 命じ (continuative form of 命じる, 'to order') + 終わる ('to finish').