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shrillness(noun) the quality of being sharp or harsh to the senses. the shrillness of her hair color. shrillness, stridence, stridency(noun) having the timbre of a loud high-pitched sound.
1 Hoarseness is an abnormal change in the voice. 2  The most common cause of hoarseness is acute laryngitis.  The underlying cause of hoarseness can usually be diagnosed by a health care professional based on the patient's history and physical exam.