Sentence:  The mouth with its bright, shiny grimace exposes a <WSD>stubby</WSD> row of teeth, from left to right growing <WSD>stubbier</WSD> and <WSD>stubbier</WSD>, with more and more cavities. 
Meaning of the word marked with <WSD> tags:  Like a stub; short, especially cut short, thick and stiff; stunted; stubbed.