(especially of dogs) to make a deep, rough sound while showing the teeth, usually in anger or (of people) to speak or say something angrily and forcefully. (Cambridge Dictionary)
To cause to become knotted and intertwined: Tangle. (Merriam -Webster)
To make excessively complicated. (Merriam – Webster)
When an animal snarls, it makes a fierce, rough sound in its throat while showing its teeth. (Collins Dictionary)
If you snarl something, you say it in a fierce, angry way. (Collins Dictionary)
A snarl is a disorganised mass of things. (Collins Dictionary)
Wolf Alice review – sweetness and snarl from indie-rock revolutionaries.