"Simple" is the opposite of "complicated". "Easy" is the opposite of "hard". Reaching a high shelf is very simple. But if you're short, it may be hard. Calcu

"Simple" is the opposite of "complicated". "Easy" is the opposite of "hard". Reaching a high shelf is very simple. But if you're short, it may be hard. Calculus is very complicated. But if you're a third-year grad student in mathematics, it may also be very easy for you.