More N1 vocabulary

• 介入かいにゅうintervention
• 雇用こようemployment (long term); hire
• 入手にゅうしゅobtaining; coming to hand
• 好評こうひょうpopularity; favorable reputation
• 概略がいりゃくoutline; summary; gist; in brief
• 殿しんがりrear; rear unit guard