Here's a breakdown:
* दीर्घम् (dīrgham): Long
* आयुष्य (āyuṣya): Life
* भवतु (bhavatu): May it be
This phrase literally translates to "May long life be". It is a respectful and traditional way to wish someone a long and healthy life in Sanskrit.
Other variations are possible depending on the context and level of formality. For example, you could use "दीर्घमायुषः भवतु" (dīrghamāyuṣaḥ bhavatu) for a more formal or poetic approach.
Remember that the pronunciation of Sanskrit is a bit different than English. You can find pronunciation guides online to help you get it right.