Don’t be fooled into assuming the sentence is correct. It is not. Ask whoever proposed the sentence to show it is correct.

In the context of the sentence presented, his fingers were thick, muscular and stubby, rather than sleek and slender.

stubbed meaning became stubby, certainly there is a better choice of words to describe same, but all you have to do is look at the hands of an older person who has been a construction laborer all their lives to know exactly what it means.

One descriptive phrase I found was “His broad hands terminated in stubby fingers attached to calloused palms, and his muscled forearms were like a real-life Popeye.” If you find yourself defending your research skills and effort, you may use it if you wish.

A question: Did your list maker “Websterize” the word? Is Websterize a word?

Use “websterize” in a sentence: I think my aunt websterized the word “websterize”.

Definition: v. Made it up.

1. reduced to or resembling a stub; short and thick; stumpy.

2. abounding in or rough with stubs. (something having a short, blunt shape, or showing signs of being knocked often)

Maybe they’re saying his hands were blistered or weathered from a life he didn’t necessarily want to lead. Hands could be a metaphor for something else.