UNDERHAND

underhand. Underhand, a. sly, cunning, private, secret

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Un″der‐hand′ (?), a. 1. 1. Secret; clandestine; hence, mean; unfair; fraudulent. Addison.
2. 2. (Baseball, Cricket, etc.) Done, as pitching, with the hand lower than the shoulder, or, as bowling, with the hand lower than the elbow.