arrow
/ˈærəu; `æro/ n
1 thin pointed stick designed to be shot from a bow1(1) 箭; 矢. =>illus at archery (archer) 见archery之插图.
2 mark or sign resembling this -->, used to show direction or position 箭号, 箭头（即 -->, 用以指示方位）
Follow the arrows on the map. 跟著地图上的箭头走.
3 (idm 习语) straight as an arrow/die => straight1.