However, there is no fruit specifically known as "sangam fruit" in Tamil or any other language. It's possible that this is a colloquial term used in a specific region or community.
Could you provide more context about what you're looking for? For example:
* Where did you hear this term?
* What kind of fruit are you thinking of?
* What are the characteristics of this fruit?
With more information, I can try to help you find the correct Tamil word.