This is the 4th most frequent Portuguese word.
da
"Da" is a contraction of "de" (of/from) and "a" (the, feminine singular).
Here, 'da' is a contraction of 'de' (of) and 'a' (the). It functions to indicate possession or relation.
A chave da porta está na mesa.
The key to the door is on the table.
In this sentence, 'da' functions as a contraction of 'de' (of) and 'a' (the), indicating association or origin.
O sabor da comida é incrível.
The taste of the food is amazing.
Here, 'da' is a contraction of 'de' (of) and 'a' (the), used to specify the object of liking.