underhand

[ uhn-der-hand ]
/ ˈʌn dərˌhænd /

adjective

not open and aboveboard; secret and crafty or dishonorable: an underhand deal with the chief of police.
executed with the hand below the level of the shoulder and the palm turned upward and forward: an underhand delivery of a ball.

adverb

with the hand below the level of the shoulder and the palm turned upward and forward: to bowl underhand.
secretly; stealthily; slyly.

Origin of underhand

before 900; 1530–40 for def 1; Middle English under hande (adv.) under rule, Old English underhand. See under-, hand
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for underhand

British Dictionary definitions for underhand

underhand

/ (ˈʌndəˌhænd) /

adjective Also: underhanded

clandestine, deceptive, or secretive
sport another word for underarm

adverb

in an underhand manner or style
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012