kernel
/ˈkɜːnəl/noun
1- a softer, usually edible part of a nut, seed, or fruit stone contained within its hard shell果仁。
1.1
- the seed and hard husk of a cereal, especially wheat谷粒, 麦粒。
1.2
- in sing. the central or most important part of something核心; 中心：
this is the kernel of the argument.
这是争论的核心。
1.3
- the most basic level or core of an operating system of a computer, responsible for resource allocation, file management, and security（计算机操作系统的）核心程序。
1.4
- as modifier Linguistics denoting a basic unmarked linguistic string【语言学】核心句。
词源
Old English cyrnel, diminutive of CORN1.