underhandedly

Adverb

Meaning

In an underhand manner.

Source: Webster's dictionary

underhand secretly quietly overly intimately covertly fraudulently deceptively slyly stealthily immorally dishonestly confidentially furtively corruptly

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naturally fairly honestly cleanly sincerely earnestly

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Mean revenge, committed underhand Source: Internet

oldline aristocratic diplomats underhandedly undermined the attempt...to align Germany with the Western democracies Source: Internet

underhand underhanded underhandedness underhander underhanding