pressure point

/P R EH1 SH ER0 P OY0 N T/
noun
  1. 1

    A specific small area of the body targeted, due to a cluster of nerves being close to the skin, usually not protected by bone.

    โ€œFor this strike, if your thumb is tucked correctly, you should hit the pressure point where their arm meets their shoulder.โ€

Source: https://en.wiktionary.org/wiki/pressure%20point