stamina
n. uncountable B2 Upper Intermediate US //ˈstæmənə// UK //stˈæmɪnɐ// stami·na
n. the physical or mental strength that lets you keep doing something difficult for a long time. It is what helps you finish a long race or a hard day of work.
n. the physical or mental capacity to sustain prolonged effort or activity. Often refers to endurance in athletic or professional contexts.
You need a lot of stamina to run a marathon.
The long hours of the medical residency require both physical stamina and mental resilience.
While the young athlete possessed explosive speed, he lacked the cardiovascular stamina required to maintain that intensity throughout the final quarter of the match.
From Latin stāmina, plural of stāmen.
Usage
Typically used as an uncountable noun; often paired with verbs like 'build', 'require', or 'increase'.