What does inoperable mean?
Inoperable is a formal adjective meaning unable to be operated or used effectively. It commonly describes machinery, vehicles, equipment, or technical systems that cannot function because of damage, failure, or some other impediment. The word is more precise than “broken”: something may be partly damaged yet still perform at least some of its functions, whereas an inoperable system cannot be put into effective operation. Inoperable also appears in legal and technical contexts, such as “rendered inoperable,” meaning made incapable of operation. Its negative prefix, in-, combines with operable to form a word with an emphatic, professional tone, making it particularly suitable for safety notices, engineering reports, and formal descriptions of unusable systems.
adjectiveUnable to be operated or put into effective functioning. It describes equipment, systems, or processes that cannot be used, or are not functioning properly.
- Unable to be operated or used effectively, especially because of a fault or defect.
"The machine was inoperable until the damaged motor had been repaired."
"A failed safety valve left the entire apparatus inoperable."
"The storm made several of the smaller boats inoperable for the rest of the week."
A machine can be powered on and still be inoperable: when something is broken beyond use, switching it on is not the same as making it work.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does inoperable come from?
Inoperable was formed in the 19th century from the Latin prefix in-, meaning “not,” and operable, which derives from Latin operari, “to work” or “to operate.” The same Latin root appears in operation, operator, and cooperate, as well as in the larger family of words connected with work and working.
Related word forms
How inoperable is actually used
The word is formal and technical. It is more specific than simply “broken” and often emphasizes that a device or system cannot perform its intended function.
Easily confused with inoperable
Inoperable describes something that cannot be operated or made functional, while inoperative more often describes something that is not currently functioning or is not in effect.
Nonfunctional is a broad term meaning that something does not work, whereas inoperable more specifically suggests that something cannot be operated or put into effective use.