strain (as it related to force and pressure)

s5. N-UNCOUNT

Strain is a force that pushes, pulls, or stretches something in a way that may damage it.

• Place your hands under your buttocks to take some of the strain off your back.
  

6. N-VAR : usu n N

Strain is an injury to a muscle in your body, caused by using the muscle too much or twisting it.

• Avoid muscle strain by warming up with slow jogging.
  

7. VERB

If you strain a muscle, you injure it by using it too much or twisting it.

• He strained his back during a practice session.
  

9. VERB

When you strain food, you separate the liquid part of it from the solid parts.

• Strain the stock and put it back into the pan.
  

.. Cobuild