Which of the following words is closest in meaning to “Surmount”?

Surmount means to overcome a difficulty.

• Correct answer - to overcome: it has the same meaning as Surmount.
• influence: the power to affect others - wrong, it does not mean the same as Surmount.
• understand: to grasp the meaning of - wrong, it does not mean the same as Surmount.
• calculate: to work out mathematically - wrong, it does not mean the same as Surmount.