Multiple choice general knowledge I hate to throw _______ on your idea, but do you really think she will approve? sand water fire salt Reveal answer Fill a bubble to check yourself B Correct answer Explanation The idiom 'throw cold water on' means to discourage or dampen enthusiasm for an idea or plan. Cold water extinguishes fire, just as discouragement kills excitement. 'Sand,' 'fire,' and 'salt' don't complete this common expression.