symbiotic

adjective
1
used to describe a relationship between two different living creatures that live close together and depend on each other in particular ways, each getting particular benefits from the other
همزیستی, تشریک‌زیستی, وابسته به هم‌زیستی
2
used to describe a relationship between people, companies, etc. that is to the advantage of both
همزیستی, یاری‌گرانه
The two formed a close friendship and a symbiotic working relationship that lasted half a century.