in·op·er·a·tive

[in-op-er-uh-tiv, -op-ruh-tiv, -op-uh-rey-tiv]
adjective
1.
not operative; not in operation.
2.
without effect: inoperative remedies.
3.
no longer in effect; void; canceled: The earlier rule is now inoperative.

Origin:
1625–35; in-3 + operative

in·op·er·a·tive·ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
inoperative (ɪnˈɒpərətɪv, -ˈɒprə-) [Click for IPA pronunciation guide]
 
adj
1.  not operating
2.  useless or ineffective
 
in'operativeness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Inoperative is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Example sentences
The smelter has been inoperative for several years, with negotiations and planning for cleanup of the site occurring since then.
Ironically, this was the same day that the local weather radar became operational after being inoperative for several years.
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