Become Rotten is a term used to describe the process of something deteriorating over time. The crossword solutions for this term are ADDLE (5 letters), SPOIL (5 letters), DECAY (5 letters), and EGG (3 letters). ADDLE means to become confused or muddled, SPOIL means to go bad or become ruined, DECAY means to rot or decompose, and EGG means to urge or encourage. Together, these words describe the process of something becoming rotten over time due to confusion, ruin, decomposition, and encouragement.