How to pronounce “knobby” in English

We kept to the muddy ruts torn in the blanket of snow by knobby winter tires.

The skin, stretched taut over the knobby body, appears thin and mucosal, making this thing look terribly exposed, like a bodily organ drawn by the hand of a surgeon

And when you're preparing it, just make sure you give it a really, really good scrub because it has all these knobby little bits and hairs; again,

And he said in that moment, do you realize that this entire gnarly conversation started with that knobby thing that puked on Anoop?