Word: Caramelise (or Caramelize in American English)
Definition:
To caramelise means to cook sugar until it melts and turns into a smooth, brown, sweet substance called caramel. This process also applies to fruits and vegetables when they are cooked until their natural sugars turn brown and create a sweet flavor.
Caramelising is a cooking technique that transforms sugar (or other foods) into a delicious caramel through heat.