IPA: /ˈɡraʊliəst/
KK: /ˈɡroʊlaɪəst/
The most growly; having a low, rough, or gruff sound or manner, often used to describe a voice or a person's demeanor.
The growliest dog in the park barked loudly at the passing cars.
Comparative: growlier
Superlative: growliest
'growliest' is formed from 'growl' (of uncertain origin, possibly imitative of the sound made by animals) and the suffix '-iest' (meaning most). The word 'growliest' describes the state of being the most growling, often used to refer to an animal or person that is particularly fierce or threatening in their growl.
Think of the sound 'growl' that animals make when they are feeling fierce, and remember that 'growliest' means the most fierce or threatening growl.