This is the 15175th most frequent Russian word.
полянку
"Полянку" is the diminutive form of "поляна," meaning "a small meadow" or "clearing."
'Полянке' is used here in the locative case, describing the location where the flowers grew.
На лесной полянке росли красивые цветы.
Beautiful flowers were growing in the forest glade.
'Полянку' is used in the accusative case, indicating the direct object of the verb 'covered'.
Мы накрыли полянку скатертью для пикника.
We covered the glade with a tablecloth for the picnic.
'Полянку' is used in the accusative case, emphasizing the object of the observation.