principal(a)
n. the original amount of a debt on which interest is calculated the educator who has executive authority for a school"she sent unruly pupils to see the principal"
同义词：school principalhead teacherhead
an actor who plays a principal role 同义词：starlead
capital as contrasted with the income derived from it 同义词：corpusprincipal sum
the major party to a financial transaction at a stock exchange; buys and sells for his own account 同义词：dealer
adj.most important element"the principal rivers of America"; " the principal example"
同义词：chief(a)main(a)primary(a)