effort is use more strength or commitment to a particular action., with the aim of achieving better results. Making an effort can be using physical, intellectual or moral strength.
As for example in the sentences:
"It was a very big effort, but she managed to finish the marathon". (physical effort)
"It takes some effort to learn a new language." (Intellectual effort)
"His effort to prove the truth was remarkable." (moral effort)
Between the synonyms for effort are strength, energy, encouragement, impulse, struggle, cost, diligence, commitment, dedication, enthusiasm and courage.
The word effort is a masculine noun that comes from Latin exfortiare. The Latin word means to show strength, and is formed by the terms "ex" which means outside, and "fortis", strong.
Effort is also a conjugated form of the verb to strive, in the first person singular of the indicative, as in "I exert myself".
effort in english is effort, being also both a noun and a verb (to effort).
When saying that someone "spared no effort" means that the person did everything to reach the goal, whether using physical, intellectual or moral resources.
Usually the concept of effort is associated with that of dedication. With effort and dedication together, it is possible to achieve better results, as effort is the extra force applied to a given action, and dedication the ability to remain focused on the objective.