definition of
underhand

[1] #1 underhand a. [underhanded, underarm] with hand brought forward and up from below shoulder level; "an underhand pitch"; "an underhand stroke". wn

[2] #2 underhand r. [underhandedly] slyly and secretly; "Mean revenge, committed underhand"- John Donne; "oldline aristocratic diplomats underhandedly undermined the attempt...to align Germany with the Western democracies"- C.G.Bowers. wn

[3] #3 underhand s. [sneaky, underhanded] marked by deception; "achieved success in business only by underhand methods". wn

[4] #4 underhand r. [underarm] with the hand swung below shoulder level; "throwing a ball underarm". wn