8 letters · 13 points in Scrabble
noun an abnormally high degree of irritability or sensitivity to stimulation of an organ or body part
originFrom French éréthisme, from Ancient Greek ἐρεθισμός (erethismós), from ἐρεθίζειν (erethízein, “to irritate”).
Etymology from Wiktionary, CC BY-SA 3.0