Question

principal 【principal】adj.首要的。 n.中小学校长Chicago is the principal city in the Midwest of the United States.芝加哥是美国中西部首要的城市。The principal told the teachers to dismiss school during the heavy snowstorm.校长告诉老师们，暴风雪时学校停课。

Accepted Answer

['prɪnsəpl] 
principalmost important element
For an adjective that points to the main or most important thing, your best choice is principal. Is your principal goal for the summer to have fun or to earn some extra money?
The word, principal, comes from the Latin principalis "first in importance" and is related to the title of prince. You can see the relation when you think about its meanings — the head of a school, the starring actor in a film, and the client of an agent. Don't confuse principal with its homophone principle, a moral rule or law of nature. If you talk about a country's principal exports, you mean the main ones.
All forms of 'principal' will appear on average once every 83 pages.principalprincipalityprincipallyprincipalship
CHOOSE RIGHT WORDS: PRINCIPAL-PRINCIPLE
			
      If  offered a choice, would you rather have principles or principals? 
      A principle is a fundamental or general  truth. It might also be the original (fundamental) source of something.

America's principles establish religious liberty as a fundamental  right.
        
          Microsoft  principle group manager selling Issaquah 4BD

In  principle refers to  something in its fundamentals without all the details worked out:
      
         After just one hearing,  Arroyo's bill penalizing drunk driving and five other similar bills were approved  "in principle" by the committee on transportation.

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:

An Israeli high school principal has been summoned for a hearing  by the country's Education Ministry.
        
          Jan van Eck serves as a director and principal at the firm.
        
          The FHA refinance plan for homeowners may allow for principal  reductions and underwater refinancing opportunities for those who qualify.

If you remember that the principal is your pal, you'll be able to choose your words well.

Front	principal
Pron	['prɪnsəpl]
Back	【principal】 adj.首要的。 n.中小学校长 Chicago is the principal city in the Midwest of the United States. 芝加哥是美国中西部首要的城市。 The principal told the teachers to dismiss school during the heavy snowstorm. 校长告诉老师们，暴风雪时学校停课。
Vocab	principalmost important element For an adjective that points to the main or most important thing, your best choice is principal. Is your principal goal for the summer to have fun or to earn some extra money? The word, principal, comes from the Latin principalis "first in importance" and is related to the title of prince. You can see the relation when you think about its meanings — the head of a school, the starring actor in a film, and the client of an agent. Don't confuse principal with its homophone principle, a moral rule or law of nature. If you talk about a country's principal exports, you mean the main ones. All forms of 'principal' will appear on average once every 83 pages. principal principality principally principalship CHOOSE RIGHT WORDS: PRINCIPAL-PRINCIPLE If offered a choice, would you rather have principles or principals? A principle is a fundamental or general truth. It might also be the original (fundamental) source of something. America's principles establish religious liberty as a fundamental right. Microsoft principle group manager selling Issaquah 4BD In principle refers to something in its fundamentals without all the details worked out: After just one hearing, Arroyo's bill penalizing drunk driving and five other similar bills were approved "in principle" by the committee on transportation. 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: An Israeli high school principal has been summoned for a hearing by the country's Education Ministry. Jan van Eck serves as a director and principal at the firm. The FHA refinance plan for homeowners may allow for principal reductions and underwater refinancing opportunities for those who qualify. If you remember that the principal is your *pal*, you'll be able to choose your words well.

Principal Principle School Important Main Country's Choose Fundamental