Underplay :: Underplay (v. i.) To play in a subordinate, or in an inferior manner; to underact a part..
Underplay :: Underplay (v. i.) To play a low card when holding a high one, in the hope of a future advantage..
Underplot :: Underplot (n.) A series of events in a play, proceeding collaterally with the main story, and subservient to it..