This is the 314th most frequent Tamil word.
உன
"உன" means "your" in English.
In this sentence, 'உன' is used to indicate possession, meaning 'your'.
உன தாயார் எப்படியிருக்கிறார்?
How is your mother?
In this sentence, 'உன' is again used possessively, referring to 'your', to denote the ownership of the friends.
உன நண்பர்கள் எங்கே சென்றனர்?
Where did your friends go?
Here, 'உன' continues to signify possession, linking 'your' to the problems needing help.