Secret; clandestine.
Dishonest and sneaky; done in a secret or sly manner.
Thrown (etc.) with the hand brought forward and up from below.
With an underhand movement.
In a sly, sneaky or secret manner.
To toss or lob with an underhand movement.
(quote-book)
To trick, deceive or gull.
To excavate downward in successive steps or horizontal slices while positioned above on unbroken ore.
The lower of two hands, the hand under the work.
(ux)