This is the 1st most frequent Tamil word.
மற
The Tamil word "மற" can mean "to hide," "to conceal," or "to deny," depending on the context.
In this usage, 'மற' is part of the verb 'மறக்க' which means 'to forget'.
மறக்காமல் புத்தகம் கொண்டு வாருங்கள்.
Please bring the book without forgetting.
Here, 'மற' is used as a prefix to indicate 'the next day or the day after'.
மறநாள் நாம் மலைக்கு போகலாம்.
We can go to the hill the day after tomorrow.
Here, 'மற' is again used in the context of timing, indicating 'the next' in 'மறுநாள்' (the next day).