IPA: //ˈʃriːkiər//
KK: /ˈʃrikɪər/
Having a loud, high-pitched sound that is more intense than usual.
The shriekier the sound, the more it startled the animals.
Comparative: shrieker
Superlative: shriekiest
Shriekier → It is formed from "shriek" (from Old English *scrīcan*, meaning to cry out or scream) and "-ier" (a comparative suffix indicating more). The word "shriekier" means more inclined to shriek or scream than something else.
Think of the word 'shriek' which means to cry out loudly, and remember that 'shriekier' describes something that is more likely to make that loud cry.
No commonly confused words.