Learn Farsi: مرمت‌کار یک ورق نایاب را نیز گم نکرد. - The restorer did not lose even one rare leaf.

While نیز does mean "also" or "too" in formal Farsi, it takes on a different meaning in negative sentences. When you combine یک (one) with a noun, نیز, and a negative verb like گم نکرد, it creates the emphatic structure "not even one" or "not a single". It highlights the absolute zero scale of the action.

Why is the definite object marker را used here if یک usually makes a noun indefinite?

This is a tricky exception! In negative emphatic sentences, یک emphasizes the exact number "one" rather than acting as the indefinite article "a/an". We use را here to strongly specify the direct object being talked about: the restorer didn't lose that single quantity of the rare leaf.

Why does نیز come after را instead of before it?

The marker را is grammatically glued to the end of the noun phrase it marks (یک ورق نایاب). Emphatic words like نیز (or its conversational equivalent هم) are placed immediately after the entire concept they emphasize. Therefore, it must follow the complete object phrase, including its را marker, right before the verb.

What are the root parts of the word نایاب (rare)?

It is built from the negative prefix نا (un-/non-) and یاب, which is the present stem of the verb (to find). Put them together and you get "un-findable," which is exactly how Farsi expresses "rare" or "scarce."