எதற

In a sentence

• எதற நீதான் இங்கே வந்தாய்?

  Why did you come here?

  Here, 'எதற' is used as an interrogative word meaning 'why'.

• ஏதோ எதற சிரித்ததால் சந்தோஷமாக இருந்தேன்.

  I felt happy because of someone smiling for some reason.

  In this context, 'எதற' suggests the cause or reason for an action or event.

• எதற்ள எல்லையைக் கடந்தோம் என்று நினைக்கிறேன்.

  I think we crossed the boundary for some reason.

  Here, 'எதற' is employed to convey an unspecified or unknown reason.