Principal, Principle
A principle is a fundamental or general truth. It might also be the original (fundamental) source of something.
In principle refers to something in its fundamentals without all the details worked out:
Principal, on the other hand, is the person with the highest authority in a group, such as a school principal or the principal investor in a company. It is also the original sum of money or assets invested or lent:
If you remember that the principal is your pal, you'll be able to choose your words well. (Description from Vocabulary.com) |