How many times have you wondered which is correct?
I will always remember what my mother told me – A principal with a pal in it is a person.
It’s almost as easy as that, but not quite.
Principal, as a noun, refers to someone in a leading position like the principal of a school.
Principal, as an adjective, means most important like the principal ingredient of the soup is mushrooms.
Whereas, principle, as a noun, refers to a general or fundamental truth. You can remember it by the “le” ending, the same as in rule.
Principle is not an adjective, but principled is.
Examples:
He was regarded as a man of principle.
The basic principle was that those who worked hard would be rewarded.
The principal amount invested should be no less than $1,000.
As the principal actress in the play, she had a star on her door.
Thanks to Merriam-Webster!