1 2 3 4 1 _ _ _ _ 2 _ _ _ _ 3 _ _ _ _ 4 _ _ _ _ ACROSS 1) the froth produced by soaps or detergents 2) a sudden very loud noise 3) cancel, annul, or reverse an action or its effect 4) a vertical spar for supporting sails DOWN 1) worthless people 2) the inner and longer of the two bones of the human forearm 3) an informal term for a father; probably derived from baby talk 4) a point located with respect to surface features of some region ** Scroll down for solution. ** Are you sure you want to peek? suds clap undo mast