How to pronounce “waddle”(verb) in English

He fitted the mask tightly to his face, covered his nose and eyes to his brow, clamped the mouthpiece between his teeth, looked around for a moment at all his friendsand waddled into the water. When Cousteau was chest deep, he stopped and lay face down to gauge his buoyancy with the tanks of air on his back.He and Gagnon had designed the Aqua-Lung to be slightly buoyant in sea water because adding weight was simple and subtracting weight was impossible.