This is the 7827th most frequent Polish word.
melissę
"Melissę" is the accusative form of "melisa," meaning "lemon balm" (a type of herb).
Here 'melissę' is the accusative form of the noun 'melissa', which denotes the herb lemon balm, used in the context of purchasing it.
Kupuję melissę w sklepie zielarskim.
I am buying lemon balm in a herbal shop.
In this sentence, 'melissę' is used in the accusative case as the direct object of the action, referring to the herb added to tea.
Dodałem melissę do herbaty.
I added lemon balm to the tea.
Here 'melissę' again appears in the accusative form, showing the herb that is intended to be planted or delivered.