This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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ad. In an unworthy manner.

In an unworthy manner; not according to desert; either above or below merit: as, to treat a man unworthily; to advance a person unworthily.

ad. in an unworthy manner

""Control the fashion of your speech, I pray you, sir!" he said, with excessive haughtiness -- "The noble Laureate is my friend and host, -- I suffer no man to use his name unworthily in my presence!""