Learn Turkish: Tuzlu cevizler pahalı, tuzsuzlar çok ucuz. - The salty walnuts are expensive, the unsalted ones are very cheap.

In Turkish, you don't need a separate word like "ones". You can take an adjective like tuzsuz (unsalted) and attach noun suffixes to it directly. By adding the plural suffix -lar, it turns into a noun meaning "the unsalted ones" or "the unsalted things". This is the main focus of this lesson: turning adjectives into nouns!

What is the relationship between the suffixes on tuzlu and tuzsuz?

They are opposites created from the root noun tuz (salt). The suffix -lı/-li/-lu/-lü means "with" or "containing" (tuzlu = salty). Its exact opposite is the suffix -sız/-siz/-suz/-süz, which means "without" (tuzsuz = unsalted/saltless).

Where is the verb "are" in this sentence? Why isn't it pahalıdır and ucuzdur?

In everyday Turkish, the "to be" verb in the present tense for third-person subjects (is/are) is usually invisible. Saying cevizler pahalı perfectly translates to "the walnuts are expensive." While you can add the -dır/-dir suffix to state facts formally, leaving it off is the most natural way to speak in daily life.

Since the subject of the second half is plural (tuzsuzlar), why isn't the predicate also plural (ucuzlar)?