exertion
🇺🇸
/ɪɡˈzɜːrʃn/
🇬🇧
/ɪɡˈzɜːʃn/
physical or mental effort; trying hard to do something
After the long run, his face showed the exertion of pushing his body to its limits.
using power or force to make something happen
The successful outcome required careful exertion of influence over the team members.