The answer to the crossword for the term PRESSURE OR PUNCTURE PREFIX is ACU, which stands for 'ACUPRESSURE' or 'ACUPUNCTURE'. ACUPRESSURE and ACUPUNCTURE are two forms of traditional Chinese medicine that involve applying pressure to specific points on the body to relieve pain and promote healing. ACUPRESSURE is a form of massage that uses pressure to stimulate the body's natural healing process, while ACUPUNCTURE involves inserting thin needles into the skin at specific points to stimulate the body's energy flow. Both techniques are used to treat a variety of ailments, including headaches, muscle tension, and stress.