malfunctioning

Synonyms:

nonfunctional

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

Antonyms:

functioning

performing or able to perform its regular function

functional, operative, running, working

(of e.g. a machine) performing or capable of performing

up

(used of computers) operating properly

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