Answer: shriller

AnswerCrossword Clue
SHRILLERMore piercing and high-pitched
SHRILLERMore high-pitched.
SHRILLERSharper.
SHRILLERMarked by greater intensity
SHRILLERLess pleasing to the ear
shrillerSHRILL, having a high-pitched piercing quality