shriller

/SH R IH1 L ER0/
adjective
  1. 1

    High-pitched and piercing.

    โ€œThe woods rang with shrill cries of the birds.โ€

  2. 2

    Having a shrill voice.

  3. 3

    Sharp or keen to the senses.

  4. 4

    (especially of a complaint or demand) Fierce, loud, strident.

Source: https://en.wiktionary.org/wiki/shrill, https://en.wiktionary.org/wiki/shriller