well-established

Having been established for a long period of time. / Well-known.

Japanese Meaning

長い間確立され、信用されている / 広く知られている

The museum, a well-established institution in the community, hosts free workshops for local students every month.

その博物館は地域に長年根付いた施設で、毎月地元の学生向けに無料ワークショップを開催している。

Sense（1）

Having been established for a long period of time.

The school has a number of well-established traditions.

Sense（2）

Well-known.

It is well established that this methodology is problematic.

more well-established

（ comparative ）

most well-established

（ superlative ）