This is the 6984th most frequent Polish word.
groblowa
"Groblowa" refers to something related to a "causeway" or "embankment."
The word "groblowa" is the adjective form related to "grobla" (embankment), describing a road associated with or situated on an embankment.
Droga groblowa prowadzi do jeziora.
The embankment road leads to the lake.
Here, "groblowej" modifies "ścieżki" (path), specifying that the path is located near or on an embankment.
Wzdłuż groblowej ścieżki rosną wysokie drzewa.
Along the embankment path, tall trees grow.
"Groblowej" serves here as a proper noun referring to a street named after the concept of an embankment.