sacrilegious

Adjective
  1. Grossly irreverent toward what is held to be sacred (synset 302019844)
    "blasphemous rites of a witches' Sabbath"; "profane utterances against the Church"; "it is sacrilegious to enter with shoes on"
    similar to: irreverent - showing lack of due respect or veneration
    same as: blasphemous, profane

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