underhand

(a) with hand brought forward and up from below shoulder level
- an underhand pitch
- an underhand stroke
underarm, underhanded,
(r) 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
underhandedly,
(s) marked by deception
- achieved success in business only by underhand methods
sneaky, underhanded,
(r) with the hand swung below shoulder level
- throwing a ball underarm
underarm,

underarm underhanded underhandedly sneaky

overarm overhand overhanded

underhanded underhandedly