Antonyms of adj reverential

1 sense of reverential

Sense 1
respectful, reverential, venerating -- (feeling or manifesting veneration)

INDIRECT (VIA reverent) -> irreverent -- (showing lack of due respect or veneration; "irreverent scholars mocking sacred things"; "noisy irreverent tourists")

Similarity of adj reverential

1 sense of reverential

Sense 1
respectful, reverential, venerating -- (feeling or manifesting veneration)
       => reverent (vs. irreverent) -- (feeling or showing profound respect or veneration; "maintained a reverent silence")