Sweating/ Suer means to gently cook vegetables in a little fat without colouring over low heat to bring out the flavour. When you suer an onion, you cook it low and slow until it is transparent. On the other hand, sautéing an onion would be to cook it until it has a golden brown colour.
Laten zweten, vocht laten verliezen zonder te kleuren.
Glazig laten worden van bvb ui.