It means a few words. That only the necessary speaks. Sober, moderate, simple, frugal, short, scarce, serious, reserved, austere, quiet, circumspect.
Moderate, thrifty, reserved and cautious. From the latin parcus, a, um ( " save " " be austere " ).
PARCO: PARCUS.QUALIFIES THE MODERATION LIMITED OF A PERSON WITH EXPLANATIONS.