～目
～め · ～me · JLPT N4 · noun
sequence
👁️ 目 = eye, then a mark on a scale: 三番目 is the third notch you count to
目 means eye, and by extension a point or notch you can mark off, like the divisions on a ruler. Add it after a number plus counter and it turns how many into which one: 二回 = two times, 二回目 = the second time.