This is the 813th most frequent Estonian word.
neljanda
"Fourth" (genitive case of "neljas").
The word "neljanda" indicates the ordinal number (fourth) and functions as an adjective describing "katsega" (attempt).
Ta jõudis neljanda katsega eesmärgile.
He achieved the goal on his fourth attempt.
The word "neljanda" is used as an ordinal number (fourth) and acts as an adjective modifying "korruse" (floor).
Ta elab neljanda korruse korteris.
She lives in an apartment on the fourth floor.
Here, "neljanda" qualifies the noun "värava" (gate), providing an ordinal attribute (fourth).