Learn Turkish: Uzun bir hayat için sağlık gerekli. - Health is necessary for a long life.

İçin translates to "for", but it is a postposition. This means it always comes after the word or phrase it connects to, unlike English prepositions that come before. So instead of "for a long life", Turkish says "a long life for" (uzun bir hayat için).

Why is the word order uzun bir hayat instead of bir uzun hayat?

In Turkish, when you use an adjective alongside bir (a/an), the adjective comes first. The pattern is usually Adjective + bir + Noun. So "a long life" becomes "long a life" (uzun bir hayat).

Where is the word for "is" in sağlık gerekli?

In Turkish, you do not always need a specific verb for "is" in simple descriptive sentences. Placing the noun sağlık (health) before the adjective gerekli (necessary) is enough to mean "health is necessary". You could add the formal suffix -dir to make it gereklidir, but leaving it off is very common in everyday speech.

Could we put sağlık at the beginning of the sentence?

Yes! Sağlık uzun bir hayat için gerekli is also perfectly correct. Placing uzun bir hayat için at the beginning of this sentence just slightly shifts the focus onto the "long life" aspect, but the core meaning remains exactly the same.