noun / verb
increase
in-KREES/ɪnˈkriːs/
A rise in size, amount, or degree, or to cause such a rise.
The jars show an increase in the quantity of beans from left to right.

Etymology
The pieces convey growing upon or swelling, an image of something becoming greater. That growth applies both to becoming larger and to making something larger.
In context
they go back to it they're less able to tolerate that same amount of load and the pain returns sometimes worse this is why it's so important to continue to increase your body's capacity
More examples
- Prices increase when supplies are limited.
- Regular practice increases your confidence.
- We increased the font size to make the instructions easier to read.
Forms
increase · increases · increased · increasing