Saiwar da reshen suna girma.

and

Breakdown of Saiwar da reshen suna girma.

• su: they
• girma: to grow
• saiwa: the root

Questions & Answers about Saiwar da reshen suna girma.

Why are the words saiwar and reshen not just saiwa and reshe?

Those -r and -n endings are part of Hausa noun morphology.

• saiwa → saiwar
• reshe → reshen

These are the determined/linked forms of the nouns. Very roughly, they often make the noun sound more specific or identifiable, somewhat like the root and the branch in English.

The endings also reflect grammatical gender:

• -r is common with feminine nouns
• -n is common with masculine nouns

So here:

• saiwa is feminine, so it becomes saiwar
• reshe is masculine, so it becomes reshen

Does da mean and here, or does it mean with?

Here da means and.

So saiwar da reshen means the root and the branch.

This is a very common Hausa word with several meanings, including:

• and
• with
• sometimes by/using

You have to tell from context. In this sentence, it is clearly joining two nouns, so and is the natural reading.