This is the 11677th most frequent Portuguese word.
piano
A musical instrument with a keyboard, strings, and hammers.
Here 'piano' refers to the musical instrument 'piano', used as a noun representing the object the person interacts with.
Eu gosto de tocar piano nas tardes tranquilas.
I like to play the piano during tranquil afternoons.
In this context, 'piano' again refers to the musical instrument, emphasizing its role in the inventive process of the composition—it is a noun connected with artistic creation.
A música que ele compôs para piano é maravilhosa.
The music he composed for piano is wonderful.
In this sentence, 'piano' is used contextually as an adjective meaning 'softly' or 'in a quiet manner', showcasing the word's usage outside its primary meaning.