1. To prepare food for eating and then heating it, for example in an oven or in a saucepan. English = cook.
2. To combine two or more substances in a container, especially as a stage in preparing food, by moving a spoon or similar implement around and around in it. English = stir, mix.
3. [With increased speed and tension] to mix or stir together eggs, cream, or butter thoroughly and energetically using a fork or a whisk. English = beat, whip, whisk.