| underhandedly | (adv) slyly and secretly; - John Donne; - C.G.Bowers, Syn. underhand, Example: Mean revenge, committed underhand; oldline aristocratic diplomats underhandedly undermined the attempt...to align Germany with the Western democracies |
| Underhandedly | adv. In an underhand manner. [ 1913 Webster ] |
| heimlich { adv } | underhandedly [Add to Longdo] |