Regarding, prepared from, or containing a flowering Paeonia plant (peony), especially its flowers.
Grandma straightened up and took a deep breath. With a hand pressed over her mouth, she coursed Bruno back into his guest bedroom and slung the tear-soaked nightgown on his bedfront. At the sight of the empty enamel bowl, she caught a new fit. It was only now that Bruno recognised that these, in fact, were uncontrollable waves of amused squeals and suppressed laughter:
—That... Eah... That thing...— she gasped. —Before sleep! Not drink up were you supposed to, that conpotion peonal! The master should have rinsed in there that thingy of boys'...! (Context: A visiting family will be spending a night unexpectedly on 5 Misty Road. Grandma Estela instructs their son Bruno how to prepare himself for bed in an old-fashion way. By mistake, he gulps up a fragrant concoction meant for hygienic purposes, believing it was tea. Source: J∙ Okram - The Mystery of the Rammed Key.)