nonfunctional

1. Not having or performing a function (synset 301094686)
   also: unserviceable - not ready for service
   tells us about: function, purpose, role, use - what something is used for
   similar to:

   • nonstructural - not structural
   • cosmetic, decorative, ornamental - serving an esthetic rather than a useful purpose
2. Not performing or able to perform its regular function (synset 301095835)
   "a malfunctioning valve"
   similar to:

   • amiss, awry, haywire, wrong - not functioning properly
   • bad, defective - not working properly
   • out of whack - out of balance or out of adjustment
   • run-down - having the spring unwound
   same as: malfunctioning

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