Ключевые слова: adversity, animal, attempt, background, backwards, ball, beetle, business, challenge, challenges, challenging, competition, complex, concept, confidence, conquer, couple, courage, difficult, difficulty, drudge, dung, effort, energy, exertion, expenditure, hard, insect, labor, leader, macro, management, metaphor, motivation, overcoming, plug, power, proficiency, risk, rolling, scarab, strength, strong, success, sweat, trouble, try, two, wildlife, work,