(ש"ע) מאמץ; ניסיון; מבצע

בפיזיקה, אנרגיה היא גודל פיזיקלי סקלרי, שמציין את כמות העבודה היכולה להיעשות על ידי כוח, המסייע להבנה בכל תחומי הפיזיקה. לפי הגדרה כללית יותר, אנרגיה היא הגודל הפיזיקלי שנשמר כתוצאה מכך שחוקי הפיזיקה קבועים בזמן.

להמשך המאמר ראה Wikipedia.org...

n. physical or mental exertion, labor; attempt; something accomplished through hard work; organized operation

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Noun
1. earnest and conscientious activity intended to do or accomplish something; "made an effort to cover all the reading material"; "wished him luck in his endeavor"; "she gave it a good try"
(synonym) attempt, endeavor, endeavour, try
(hypernym) activity
(hyponym) batting
2. use of physical or mental energy; hard work; "he got an A for effort"; "they managed only with great exertion"
(synonym) elbow grease, exertion, travail, sweat
(hypernym) labor, labour, toil
(hyponym) struggle
3. a series of actions advancing a principle or tending toward a particular end; "he supported populist campaigns"; "they worked in the cause of world peace"; "the team was ready for a drive toward the pennant"; "the movement to end slavery"; "contributed to the war effort"
(synonym) campaign, cause, crusade, drive, movement
(hypernym) venture
(hyponym) advertising campaign, ad campaign, ad blitz
4. a notable achievement; "he performed a great deed"; "the book was her finest effort"
(synonym) deed, feat, exploit
(hypernym) accomplishment, achievement
(hyponym) acquiring, getting

nm. effort, attempt; stress, strain; exertion, endeavor; spirt, pain, stroke

n. úsilí; snaha; výkon