pith

Old English piþa, from Proto-Germanic *piþô (compare West Frisian piid (“pulp, kernel”), Dutch peen (“carrot”), Low German Peddik (“pulp, core”)), from earlier *piþō (oblique *pittan). Doublet of pit. The verb meaning "to kill by cutting or piercing the spinal cord" is attested 1805.

• IPA^(key): /pɪθ/
• Rhymes: -ɪθ

pith (usually uncountable, plural piths)

1. (botany) The soft, spongy substance in the center of the stems of many plants and trees.
2. The spongy interior substance of a feather.
3. (anatomy) The spinal cord; the marrow.
4. (botany) The albedo of a citrus fruit.
5. (figuratively) The essential or vital part; force; energy; importance.

   The pith of my idea is that people should choose their own work hours.

   • Shakespeare

     enterprises of great pith and moment

• (essential or necessary part): core, essence, general tenor, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, quintessence, soul, spirit, stuff, substance; See also Thesaurus:gist

• pith helmet
• pithy
• pith and substance

pith (third-person singular simple present piths, present participle pithing, simple past and past participle pithed)

1. (transitive) To extract the pith from (a plant stem or tree).
2. (transitive) To kill (especially cattle or laboratory animals) by cutting or piercing the spinal cord.

• phit