• Verb: enter or assume a certain state or condition; examples: "He became annoyed when he heard the bad news", "It must be getting more serious", "her face went red with anger", "She went into ecstasy", "Get going!"
• Verb: undergo a change or development; examples: "The water turned into ice", "Her former friend became her worst enemy", "He turned traitor"
• Verb: come into existence; example: "What becomes has duration"
• Verb: enhance the appearance of; examples: "Mourning becomes Electra", "This behavior doesn't suit you!"
You can become famous but you can't become unfamous. You can become infamous but not unfamous.