Enter a clue or pattern or both:
The Clue
Unfit for use (10 letter answer)
The Answer
INOPERABLE
Tags
Notes
The answer INOPERABLE is so rare that it appears less than once every 2500 puzzles.
Definition
INOPERABLE as an adjective:
1. not able to perform its normal function
2. not suitable for surgery; "metastasis has rendered the tumor inoperable"