/ aɪˈkɒnəklæst; NAmE -ˈkɑːnə-/ noun
( formal ) a person who criticizes popular beliefs or established customs and ideas
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WORD ORIGIN
mid 17th cent. (originally referring to someone who destroyed images used in religious worship): via medieval Latin from ecclesiastical Greek eikonoklastēs , from eikōn likeness + klan to break.