Tessellarius tesseram inserit.

The mosaicist inserts a mosaic cube.

Breakdown of Tessellarius tesseram inserit.

• tessera: the small mosaic cube
• tessellarius: the mosaicist
• inserere: to insert

Questions & Answers about Tessellarius tesseram inserit.

Why does tessellarius end in -us?

Because tessellarius is a second-declension masculine noun in the nominative singular.

In this sentence, it is the subject, so Latin uses the nominative case. The ending -us is a very common nominative singular ending for second-declension masculine nouns.

So here, tessellarius means the mosaic worker / tile-layer as the one doing the action.

Why does tesseram end in -am?

Because tesseram is in the accusative singular.

It is the direct object of the verb—the thing being inserted—so Latin puts it in the accusative case. For many first-declension nouns, the accusative singular ends in -am.

So:

• tessera = nominative singular
• tesseram = accusative singular

That change in ending helps show its job in the sentence.

How do I know which word is the subject and which is the object?

In Latin, you often know this from the case endings, not from word order alone.

Here:

• tessellarius has the nominative ending, so it is the subject
• tesseram has the accusative ending, so it is the direct object

So even if the words were rearranged, the endings would still tell you who is doing the action and what is receiving it.