pithy

the word 'pithy' originates from the old english noun 'pitha', which referred to the soft, spongy central tissue in plant stems. this core substance was metaphorically extended to signify the most vital or essential part of something. by adding the adjectival suffix '-y', meaning "full of" or "characterized by," the term evolved to describe language that is concentrated and full of substance, much like the pith is the concentrated core of a plant. thus, the modern sense of being concise and meaningful directly stems from the literal idea of containing the essential part.

Structure: pith (essence) + y (adjective suffix) pith (old english, meaning the essential or central part); y (old english, a suffix forming adjectives meaning "characterized by" or "full of").