This is the 707th most frequent Serbian word.
установи
Depending on context, "установи" can mean "establish," "determine," or "institutions" in English.
In this sentence, 'установио' is used in the past tense to mean 'established, set up' as a completed action.
Он је успешно установио нову методологију у свом раду.
He successfully established a new methodology in his work.
Here, 'установимо' is used in the present subjunctive to imply 'determine, identify' as part of a planning action.
Морамо да установимо узрок проблема пре него што га решимо.
We need to determine the cause of the problem before solving it.
In this sentence, 'установу' refers to a 'facility, organization, or institution' as a noun derived from the same root.