This is known as 'reneging.' If you draw a card and its not playable, your turn ends.

On your turn, even if you have playable cards, you can choose to draw a card. If you draw a card, and its not playable, your turn ends. On your turn, if you don't have any playable cards, you must draw a card. However, you can only play it when you have no other moves In addition, there are draw four wild cars, shown with a +4 - this powerful card lets you choose the suit and also forces the next player to pick up four cards. When you play it, you'll be able to chose the color for the next player. A usual wild card is shown with a W and can be played at any time. If you have wild cards, you can play them no matter the current color. The draw two card (+2) makes the next player draw two cards.The reverse card (↷) reverses the order of play.The skip card (⦻) skips the very next player.Some cards of a given color also have special effects: Typically speaking, each turn, you can play a card that has either the same color or the same number as the top card on the discard pile. In the center, you'll see the discard pile. Be sure all other players have joined before you start the game! They will not be able to join after you start the game. Once you select Start Game, you'll see the cards you have in your hand. If you're playing with others, they can join your game by using the exact same room name. The room name can be anything you like (ex: 'joan's room'). To get started, enter a name for yourself (ex: 'uno-player-100') and a room name. Uno is multiplayer, and works for between 2 to 6 players. The first player to play all the cards in their hand wins the round, and scores points. In Uno, the goal is to be the first player to play all your cards.

Uno ubisoft free