Below you can find the Term for boiling a sauce to lessen the volume by evaporation causing it to thicken Jeopardy Words Answer. The answer to Term for boiling a sauce to lessen the volume by evaporation causing it to thicken has 8 letters. This clue belongs to the Cooking category and is part of Jeopardy Word Level 1430. If you scroll near the bottom you will find other clues and answers part of level 1430