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历史：
kernel
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Whether it’s the kernel of a pistachio nut or the kernel of wisdom in a story, kernel can refer to the center or essential part of something.
The word kernel traces back to the Old English word cyrnel, which is related to corn. If you have ever eaten corn on the cob, you ate the kernels. Popcorn is made by heating corn kernels until they explode, or "pop." Like these examples, sometimes kernel means "a small bit" or "single piece," as in a story someone tells you that couldn't possibly have happened as described, but still has a kernel of truth about human nature.
WORD FAMILY
kernel: kernelling, kernels
USAGE EXAMPLES
She walked ahead, digging a hole with her stick and dropping in three corn kernels from her own sling.
Literature(Jul 10, 2014)
Beneath the sour grapes is a kernel of truth.
Los Angeles Times(Jul 09, 2014)
OS updates typically up the Kernel and the radios.
Forbes(Jul 09, 2014)
It’s hard to keep track of what happened next because the German goals arrived like corn kernels popping.
Forbes(Jul 08, 2014)
There would be only a few cobs on each plant, and the kernels would be small and deformed.
Literature(Jul 07, 2014)
1
na single whole grain of a cereal
a kernel of corn
2
nthe inner and usually edible part of a seed or grain or nut or fruit stone
black walnut kernels are difficult to get out of the shell
Synonyms:
meat
3
nthe choicest or most essential or most vital part of some idea or experience
Synonyms:
center, centre, core, essence, gist, heart, heart and soul, inwardness, marrow, meat, nitty-gritty, nub, pith, substance, sum

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