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center, substance, core, heart, essence, sum, centre, inwardness, marrow, kernel, gist, heart and soul, meat, nub, pith, nitty-gritty | the choicest or most essential or most vital part of some idea or experience | |
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pith | soft spongelike central cylinder of the stems of most flowering plants | |
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V2 |
pith | remove the pith from (a plant) |