This is the 108th most frequent Romanian word.
aproximativ
Approximately.
Here, "aproximativ" is used as an adverb to denote an estimation of the time duration spent in the square.
Am stat în piață aproximativ două ore.
I stayed in the square for approximately two hours.
In this sentence, "aproximativ" suggests that the number being referred to is roughly equal to a previously mentioned figure.
Numărul participanților este aproximativ la fel ca anul trecut.
The number of participants is approximately the same as last year.
"Aproximativ" in this context is an adverb modifying the adjective "pătrată," indicating that the described shape closely, but not exactly, resembles a square.