動員
どういん · douin · JLPT N1 · noun
mobilization
🪖 動 (move, dō) + 員 (member, in): move the members into action, which is mobilization
動 means move or act, and 員 means member or staff. Mobilizing means moving people into service, often for war or a campaign. The same 動 appears in 行動 (action) and 活動 (activity).