adjective
intense
in-TENS/ɪnˈtens/
Very strong or deeply felt.
The athlete's intense effort shows in the firm grip on the climbing hold.

Etymology
Here the stretching image survives as something strained or tight. That physical state became a description of qualities and feelings at a great or extreme degree.
In context
to relieve periods of intense pressure with periods of no pressure at all.
More examples
- She feels intense relief when her missing dog comes home.
- Competition for the scholarship is intense.
- The pain becomes more intense whenever I move my shoulder.
Forms
intense · more intense · most intense
intensity noun — The degree of strength or force.
intensely adverb — With great strength or deep feeling.