Noah Webster's Dictionary (v. t.) To pronounce an anathema against; to curse. Hence: To condemn publicly as something accursed.

Multi-Version Concordance Anathematize (4 Occurrences) Mark 14:71 and he began to anathematize, and to swear -- 'I have not known this man of whom ye speak;' (YLT) Acts 23:12 And day having come, certain of the Jews having made a concourse, did anathematize themselves, saying neither to eat nor to drink till they may kill Paul; (YLT) Acts 23:14 who having come near to the chief priests and to the elders said, 'With an anathema we did anathematize ourselves -- to taste nothing till we have killed Paul; (YLT) Acts 23:21 thou, therefore, mayest thou not yield to them, for there lie in wait for him of them more than forty men, who did anathematize themselves -- not to eat nor to drink till they kill him, and now they are ready, waiting for the promise from thee.' (YLT)