Englishfor English speakers
crucial
Adjective
—
When something is crucial, it is very important. It will make a big difference. You cannot succeed without it.
To write a great book, it's crucial to have the person in the book change and develop.
It was a crucial time in the battle when the king dropped his sword.
The development of this company is at a crossroads, and we need to make some crucial decisions.
Iron plays a crucial role in moving oxygen around the body.
The new doctor was crucial to the success of the operation.
factor
Noun
—
A factor is one of a number of things that causes a result.
The main factor in the success of our program is our excellent teachers.