basic/'beɪsɪk/

a. a basic thing is sth very important or necessary and others may depend on it

a. 基本的：the basic principles of mathematics 基本的数学原理

◇the basic skills of reading and writing 读和写的基本技巧

◇[basic to sth] Pepper is basic to Sichuan cooking. 辣椒在川菜中是基本调料。

构词base + -ic