Mawashi Hiraken Uchi is a technique in Kyokushin karate. It translates to 'Circular Ridge Hand Strike.' This technique involves delivering a striking motion with the ridge hand in a circular or sweeping manner, targeting various angles and areas of the opponent's body. The term 'Mawashi' means circular or round, 'Hiraken' indicates the ridge hand, and 'Uchi' refers to the striking motion. It is commonly used to attack the opponent's head, neck, or ribs from different angles with speed and precision.