With hand brought forward and up from below shoulder level:
— An underhand pitch.
— An underhand stroke.

synonyms: underarm, underhanded.

Roget 528: concealed etc. v.; hidden; secret, recondite, mystic, cabalistic, occult, dark; cryptic, cryptical^†; private, privy, in petto, auricular, clandestine, close, inviolate; tortuous.    behind a screen etc. 530; undercover, under an eclipse; in ambush, in hiding, in disguise; in a cloud, in a fog, in a mist, in a haze, in a dark corner; in the shade, in the dark; clouded, wrapped in clouds, wrapt in clouds^†; invisible etc. 447; buried, underground, perdu [Fr.]; secluded etc. 893.    undisclosed etc. 529, untold etc. 527; covert etc. (latent) 526; untraceable; mysterious etc. (unintelligible) 519.    irrevealable^†, inviolable; confidential; esoteric; not to be spoken of; unmentionable.    obreptitious^†, furtive, stealthy, feline; skulking etc. v.; surreptitious, underhand, hole and corner; sly etc. (cunning) 702; secretive, evasive; reserved, reticent, uncommunicative, buttoned up; close, close as wax; taciturn etc. 585.    ... show more

Roget 526: latent; lurking etc. v.; secret etc. 528; occult; implied etc. v.; dormant; abeyant.    unapparent, unknown, unseen etc. 441; in the background; invisible etc. 447; indiscoverable^†, dark; impenetrable etc. (unintelligible) 519; unspied^†, unsuspected.    unsaid, unwritten, unpublished, unbreathed^†, untalked of^†, untold etc. 527, unsung, unexposed, unproclaimed^†, undisclosed etc. 529, unexpressed; not expressed, tacit.    undeveloped, solved, unexplained, untraced^†, undiscovered etc. 480.1, untracked, unexplored, uninvented^†.    indirect, crooked, inferential; by inference, by implication; implicit; constructive; allusive, covert, muffled; steganographic^†; understood, underhand, underground; delitescent^†, concealed etc. 528.    ... show more

Roget 702: cunning, crafty, artful; skillful etc. 698; subtle, feline, vulpine; cunning as a fox, cunning as a serpent; deep, deep laid; profound; designing, contriving; intriguing etc. v.; strategic, diplomatic, politic, Machiavelian, timeserving^†; artificial; tricky, tricksy^†; wily, sly, slim, insidious, stealthy; underhand etc. (hidden) 528; subdolous^†; deceitful etc. 545; slippery as an eel, evasive etc. 623; crooked; arch, pawky^†, shrewd, acute; sharp, sharp as a tack, sharp as a needle^†; canny, astute, leery, knowing, up to snuff, too clever by half, not to be caught with chaff.    tactful, diplomatic, politic; polite etc. 894.    ... show more

Marked by deception:
— Achieved success in business only by underhand methods.

synonyms: sneaky, underhanded.

Slyly and secretly:
— Mean revenge, committed underhand.
— Oldline aristocratic diplomats underhandedly undermined the attempt...to align Germany with the Western democracies.

synonym: underhandedly.

Roget 528: secretly etc. adj.; in secret, in private, in one's sleeve, in holes and corners; in the dark etc. adj.. januis clausis [Lat.], with closed doors, a huis clos [Fr.]; hugger mugger, a la derobee [Fr.]; under the cloak of, under the rose, under the table; sub rosa [Lat.], en tapinois [Fr.], in the background, aside, on the sly, with bated breath, sotto voce [Lat.], in a whisper, without beat of drum, a la sourdine^†.    behind the veil; beyond mortal ken, beyond the grave, beyond the veil; hid from mortal vision; into the eternal secret, into the realms supersensible^†, into the supreme mystery.    in confidence, in strict confidence, in strictest confidence; confidentially etc. adj.; between ourselves, between you and me; between you and me and the bedpost; entre nous [Fr.], inter nos, under the seal of secrecy; a couvert [Fr.].    underhand, by stealth, like a thief in the night; stealthily etc. adj.; behind the scenes, behind the curtain, behind one's back, behind a screen etc. 530; incognito; in camera.    ... show more

With the hand swung below shoulder level.

synonym: underarm.