Learn Turkish: Yüksek aidat isteyen sitelerden kaçınmak istiyoruz. - We want to avoid residential complexes that ask for a high maintenance fee.

It uses the subject relative suffix -(y)An, which turns a verb into an adjective describing who or what is doing the action. The verb stem is iste- (to want/ask for). Because it ends in a vowel, we add the buffer -y- before the -en suffix. It literally describes them as the 'asking-for' complexes.

Why do we use the 'from' ending on sitelerden?

The verb kaçınmak (to avoid or abstain) always requires the ablative case suffix -dAn ('from'). In Turkish logic, you do not just avoid something, you retreat 'from' it. That is why siteler (complexes) takes the -den ending here.

Are isteyen and istiyoruz from the same verb?

Yes! Both come from istemek, which can mean 'to want' or 'to ask for'. In this sentence, isteyen modifies the complexes (complexes that ask for), while istiyoruz is the main verb (we want). It is perfectly normal to see the same verb root used twice for different grammatical jobs in one sentence.

Is site the same as an internet website?

Not in this context! In Turkey, a site refers to a residential apartment complex or gated community, usually with shared facilities like gardens or security. Residents pay a monthly maintenance fee called an aidat to keep these running.