IPA: /ˈθrɛdˌbɛə/
KK: /ˈθrɛdˌbɛr/
Describing something that is worn out or shabby, often because it has been used too much or is very old.
He wore a threadbare coat that had seen better days.
Threadbare → It is formed from "thread" (from Old English *þræd*, meaning a long, thin strand of material) and "bare" (from Old English *bær*, meaning uncovered or exposed). The word "threadbare" describes fabric that is worn down to the threads, making it appear thin and exposed.
Imagine a piece of fabric that has been worn so much that only the 'threads' are left, making it 'bare' — that's why 'threadbare' means worn out.