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

• Lexulous
• Wordscraper
• Wordosaur

ad. Acting in a discreet manner; one that respects privacy or secrecy; quietly; diplomatically.

ad. Inconspicuously.

Prudently; circumspectly; cautiously; judiciously; with nice judgment of what is best to be done or omitted.

ad. with discretion; prudently and with wise self-restraint

"Forbidden from evangelizing, American Christians who teach English or work in social service agencies in China spread the word discreetly."

Wheatley    completely    neatly    sweetly