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principal
/ˈpɹɪnsəpəl/
noun
The money originally invested or loaned, on which basis interest and returns are calculated.
"A portion of your mortgage payment goes to reduce the principal, and the rest covers interest."
The chief administrator of a school.
The chief executive and chief academic officer of a university or college.
adjective
Primary; most important; first level in importance.
"Smith is the principal architect of this design."
(Latinism) Of or relating to a prince; princely.
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