S1H4R1I1L1L1
9 points
SHRILL is validvalid
having a high-pitched and piercing quality [adj SHRILLER, SHRILLEST] : SHRILLNESS [n], SHRILLY [adv] / to make a piercing, high-pitched noise [v SHRILLED, SHRILLING, SHRILLS]
to utter a high-pitched sound [v -ED, -ING, -S] / having a high-pitched piercing quality [adj SHRILLER, SHRILLEST, SHRILLY]