würfeln
to roll dice
To throw one or more dice in order to get a random number, usually as part of a game.
Du bist dran, du musst jetzt würfeln.
It's your turn; you have to roll the dice now.

to roll dice / to dice
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to roll dice
To throw one or more dice in order to get a random number, usually as part of a game.
Du bist dran, du musst jetzt würfeln.
It's your turn; you have to roll the dice now.

The verb 'würfeln' (to roll dice / to dice) comes directly from the noun 'der Würfel' (the die/cube). A 'Würfel' is both the small cube you throw in games and the geometric shape created when cutting food. This explains the two meanings of the verb.
Gib mir mal den Würfel, ich bin dran mit Würfeln.
Give me the die; it's my turn to roll.
You can easily recognize the meaning from the context. If it is about a 'Spiel' (game), 'Punkte' (points), or 'Zahlen' (numbers), it means throwing a die. If it is about 'Kochen' (cooking), 'Gemüse' (vegetables), 'Fleisch' (meat), or the 'Küche' (kitchen), it means cutting food.
Wer die höchste Zahl würfelt, darf anfangen.
Whoever rolls the highest number gets to start.
When you roll a specific number, that number is in the accusative. You can also say 'um etwas würfeln' (to roll dice for something) in order to make a decision.
Ich habe schon wieder eine Sechs gewürfelt!
I rolled a six again!
When cutting food, people often specify how large the cubes should be. Typical adverbs for this are 'fein würfeln' (to dice finely) or 'grob würfeln' (to dice coarsely).
Für die Suppe sollst du das Gemüse nur grob würfeln.
For the soup, you should only dice the vegetables coarsely.
to throw
'werfen' and 'würfeln' both have to do with a movement of the hand. 'werfen' is the general word: you can throw a ball, a stone, or a key. 'würfeln' is much more specific. It means throwing one or more dice, usually in a game, so that a random number comes up. Learners may confuse the words because when you 'würfeln', you really are throwing something. But not every act of throwing is 'würfeln'.

Beim Brettspiel würfeln wir reihum und ziehen dann unsere Figuren.
In the board game, we take turns rolling the dice and then move our pieces.
Im Park wirft das Kind den Ball zu seinem Vater.
In the park, the child throws the ball to his father.