Index Finger
Pointer Finger
noun
Your person distinction finger is the finger you use to point at people to distinguish them from other people. This is your pointer finger... your index finger.
The readings are all the kun'yomi readings of everything. The word 人, the word 差す, and the word 指. Take your time with this one, it's kind of weird.
電気コードに躓いた時に、人差し指を切っちゃったんだよね。
I cut my index finger when I tripped over the electrical cords.