arena: [17] The original sense of Latin (h)arēna was ‘sand’ (hence the English technical term arenaceous ‘sandy’ [17]). The central, ‘stage’ area of classical amphitheatres, where contests were held, was covered with sand (to soak up the contestants’ blood) and so by metaphorical extension arēna became the term for this central area, and hence for any enclosed place used for contests. The word may ultimately be of Etruscan origin.
arena (n.)
1620s, "place of combat," from Latin harena "place of combat," originally "sand, sandy place," perhaps from Etruscan. The central stages of Roman amphitheaters were strewn with sand to soak up the blood.
例文
1. A 20000-seat arena with a retractable roof is planned.
2万席の開閉可能な天井付きスタジアムが計画されている。
2.Oil speculation proved a natural arena for his skills.
石油業界での投機活動は彼にとって余裕がある。
3.The competitors cantered into the arena to conclude the closing ceremony.