【正确答案】：
SYNCHRONICALLY, POLYSEMY IS VIEWED AS THE COEXISTENCE OF VARIOUS MEANINGS OF THE SAME WORD IN A CERTAIN HISTORICAL PERIOD OF TIME, SAY. MODERN ENGLISH. IN THIS WAY, THE BASIC MEANING OF A WORD IS THE CORE OF WORD-MEANING CALLED THE CENTRAL MEANING. THE DERIVED MEANINGS, NO MATTER HOW MANY, ARE SECONDARY IN COMPARISON.
【题目解析】：从共时的角度来看，多义关系可以认为是一个词的各种意义在某一历史时期（比如现代英语）的共存。从这个角度看，一个词的基本意义就是词义的核心，叫核心义。相比之下，派生义不管有多少，都是次要的，外围的。