Piercingly
Part of speech: adverb
Definition: In a piercing manner.
Shrilly
Part of speech: adverb
Definition: In a shrill manner.
Piercingly as an adverb is in a piercing manner. while Shrilly as an adverb is in a shrill manner.
Part of speech: adverb
Definition: In a piercing manner.
Part of speech: adverb
Definition: In a shrill manner.
We hope you now know whether to use Piercingly or Shrilly in your sentence.