Pith

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 312

pith, n. The soft, spongy substance in the center of many plants and trees. (Anat.) The spinal cord; marrow. Vital or e ential part; vig- ____ or; strength; importance. — Pith'y, £TtnU7~., „„,, s -T, containing, a. [-ier; or -iest.] abounding Consisting with, pith; of, energetic; Pltcher- (Bot-) condensed, forcible, and appropriate in expre ion.— Pithily, adv.