- Adversarial
adj. relating to hostile opposition
An adversarial attitude will make you many enemies in life.
- Diligence
n. conscientiousness; the quality of being committed to a task
Diligence and confidence will get you far in life.
- Fluctuate
v. to be unstable; to rise and fall
Stocks can fluctuate on a daily basis, making it difficult to determine when to buy or sell one.