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third-person singular simple present unhallows, present participle unhallowing, simple past and past participle unhallowed
(transitive) To profane; to desecrate. quotations examples
Nay, the very Ostentation of the Thorn, is a Weakness, and I might have said a Vice too; for the Vanity Unhallows the very Virtue, especially where it is Accompany'd with Detraction.
1692, Sir Roger L'Estrange, “Fable CCCCLXVI: A Fig-Tree and a Thorn”, in Fables of Æsop and Other Eminent Mythologists, page 441