From pith + -y.

• IPA: /ˈpɪθi/

pithy (comparative pithier, superlative pithiest)

1. Concise and meaningful.
   • 1825, William Hazlitt, “[S%3Aen%3AThe+Spirit+of+the+Age%2FElia%2C+and+Geoffrey+Crayon Elia, and Geoffrey Crayon]”, in The Spirit of the Age […] , London: Printed for Henry Colburn, […], →OCLC ↗:

     Mr. Lamb, on the contrary, being "native to the manner here," though he too has borrowed from previous sources, instead of availing himself of the most popular and admired, has groped out his way, and made his most successful researches among the more obscure and intricate, though certainly not the least pithy or pleasant of our writers.

   • 1876, Rosina Bulwer Lytton, “On the Gratitude we owe our Enemies”, in Shells from the Sands of Time:

     IT was a pithy saying that of Lorenzo de' Medici, and true as pithy, that we are enjoined to forgive our enemies, but nowhere are we told that we should forgive our friends.

2. Of, like, or abounding in pith; spongy or having small holes or pits.
   • 1863, Theodore Winthrop, “The Heart of the Andes”, Part 2 – Introduction, published posthumously in Life in the Open Air and other papers,

     Must we know the torrid zone only through travelled bananas, plucked too soon and pithy? or by bottled anacondas? or by the tarry-flavored slang of forecastle-bred paroquets?

   • 1910, Liberty Hyde Bailey, Manual of Gardening, Suggestions and Reminders I: For the North, April,

     Parsnip.—Dig the roots before they grow and become soft and pithy.

   • 1911, “Mushroom”, in Encyclopædia Britannica Eleventh Edition:

     To summarize the characters of a true mushroom - it grows only in pastures; it is of small size, dry, and with unchangeable flesh; the cap has a frill; the gills are free from the stem, the spores brown-black or deep purple-black in colour, and the stem solid or slightly pithy.

• (brief and to the point) terse, concise, laconic, succinct

• French: succinct, bref, sommaire, laconique
• German: kernig, knackig, markig, prägnant
• Portuguese: conciso, sentencioso, lacónico, sucinto, incisivo
• Russian: ёмкий
• Spanish: conciso, sentencioso, lacónico, lapidario, incisivo, sucinto, cortante, sintético, aforístico, compendioso, jugoso

• French: moelleux