principal

主要な、最も重要な

ほかより重要で、中心となる。

やさしい英語で： Main or more important than the others.

• Cost is our principal concern.
• Tourism is the island’s principal source of income.
• What was the principal reason for your decision?

類義語： main, chief, primary, leading

反対語： secondary

よく使う表現： principal reason, principal aim, principal source

主値の

関数が複数の値を持つとき、基準として選ばれる一つの値を表す。

やさしい英語で： Chosen as the single standard value when a mathematical function could have several values.

• The principal square root of nine is three.
• Use the principal value of the logarithm.
• This graph shows the function’s principal branch.

よく使う表現： principal square root, principal value, principal branch

校長

学校を運営し、全体の責任を負う人。

やさしい英語で： The person in charge of a school.

• The principal welcomed the new students.
• My parents met with the principal yesterday.
• She became principal of a small school.

類義語： headteacher, headmaster, headmistress

よく使う表現： school principal, principal’s office, assistant principal

責任者、プリンシパル

企業を率いる人や、芸術団体で主要な役を務める人。

やさしい英語で： A leading person in a business or a performer with a main role in an artistic group.

• The firm has three principals.
• He became a principal with the ballet company.
• All the principals attended the business meeting.

使い方： principal of something (She is a principal of the architectural firm.)

類義語： leader, head

よく使う表現： company principal, ballet principal, principal of something

元本、元金

借りたり投資したりした最初の金額。利息や利益は含まない。

やさしい英語で： The original amount of money borrowed or invested, without interest or profits.

• The principal is ten thousand dollars.
• Each payment reduces the principal of your loan.
• Interest is calculated on the remaining principal.

類義語： capital

よく使う表現： repay the principal, principal and interest, outstanding principal

学長

大学などを率い、教育と運営に責任を持つ人。

やさしい英語で： The person who leads a college or university and is responsible for its teaching and management.

• The principal welcomed the new students.
• Our college has appointed a new principal.
• The university principal spoke at the graduation ceremony.

類義語： head

よく使う表現： college principal, university principal, appoint a principal

本人、委任者

仕事や法律上の手続きなどで、他の人に自分の代わりを務めてもらう人や組織。

やさしい英語で： A person or organization that another person acts for, especially in business or legal matters.

• The agent signed for her principal.
• An agent must follow the principal's instructions.
• The contract named both principals and their agents.

類義語： client

よく使う表現： act for a principal, principal and agent, disclosed principal