IPA: /ˌʌndərˈhændɪd/
KK: /ˈʌndərˌhændɪd/
Describing actions that are secretive and dishonest, often involving trickery or deceit.
His underhanded tactics in the game made him unpopular among his teammates.
Underhanded → It is formed from "under-" (meaning beneath or below) and "hand" (from Old English "hand", meaning the part of the body used for manipulation). The word "underhanded" describes actions that are done in a secretive or deceitful manner, as if they are hidden beneath the surface.
Think of actions that are done 'beneath' ('under-') the 'hand' — this helps you remember that 'underhanded' refers to secretive or deceitful behavior.