(kernels)
1.
The kernel of a nut is the part that is inside the shell.
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2.
The kernel of something is the central and most important part of it.
The kernel of that message was that peace must not be a source of advantage or disadvantage for anyone.
= core, crux
N-COUNT: usu sing, usu N of n
3.
A kernel of something is a small element of it.
For all I know, there may be a kernel of truth in what he says.
= grain
N-COUNT: usu sing, usu N of n