The term 'turn green' can be broken down into four crossword solutions: DYE, LEAVE, ENVY, and SPOIL. DYE is a substance used to add color to fabrics or other materials, while LEAVE is the act of departing from a place or person. ENVY is an emotion characterized by a desire to possess something that someone else has, and SPOIL is to damage or ruin something. Together, these words suggest that when something turns green, it is being colored with a DYE, leaving its original state, causing ENVY in others, and spoiling its original form.