intense

1 - The transition phase of labor is the most intense and difficult phase of labor for most women.

2 - Mental vision is the process of visualizing each shot, body movement, or level of intensity as to the actual purpose in a match according to the desired level of play you want to achieve.

3 - Scientists observe active volcanoes to obtain information that might help predict the timing and intensity of the eruptions.

4 - In the summer of 2003, an intense heat wave was blamed for an estimated 35,000 deaths across large swaths of Europe.

5 - The Earth went through a period of catastrophic and intense formation during its earliest beginnings about 4.5 - 4.6 billion years ago.