marathon -
Referring to an activity that takes a long time and a great deal of effort
After the company's computers crashed, 30 programmers worked together in a 15 hour marathon debugging session to get the computers up and running again.
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intensity -
Great energy, strength, and concentration involving an activity, thought, or feeling.
During the war, the intensity of the battles decreased in the winter when it was just too cold to fight.
noun
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pep -
Energy or enthusiasm
Full of pep, Nicholas couldn't contain his excitement on the first day of summer vacation.
adjective
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feisty -
Lively, aggressive, determined, courageous, animated, energetic, and spirited
Oodles, Carla's new puppy, was feisty and nipped at her whenever she tried to pick him up.
adjective
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dynamic -
Marked by continuous and productive activity or change
The new CEO was dynamic, and totally transformed the company and made it more efficient and profitable.
verb
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boost -
Help or encourage (something) to increase or improve
Pete bought ten lottery tickets instead of one because he figured that would boost his chances of winning.
verb
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stride -
To walk with long, decisive steps in a specified direction.
On Sunday mornings, they would stride together in the park.
verb
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galvanize -
To stimulate or energize a group or movement to act in unison.
The leader's speech was successful in being able to galvanize the crowd into seeing a hopeful vision of the future.
adjective
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unstoppable -
So powerful, determined, or effective that it cannot be halted, defeated, or resisted.
With their star player back, the team were unstoppable, and won one game after another.
noun
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vitality -
The state of being strong and active; energy
Despite being far older than most of the other runners, Hank's vitality shone through as he completed the marathon.
noun
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boost -
A source of help or encouragement leading to increase or improvement
When he woke up after only a few hours of sleep, Mike knew he needed a cup of coffee to give him a boost.
adjective
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virile -
A man being full of sexual strength and energy in a way that is considered attractive
Many women like Russel Crowe's virile energy as depicted in the movie Gladiator.