melody
The word 'melodia' in Italian, like in English, is used to refer to a sequence of single notes that is musically satisfying. It is, for example, the principal part of a song or piece of music. It is used in the same context as melody in English!
This melody reminds me of my childhood.
This sentence can be used when a particular tune, music or melody brings back memories or feelings associated with a person's childhood.
The melody of the song is very catchy.
This sentence is used to express that the main tune or part of a song (its melody) is easy to remember or stays in the mind.
I wrote a melody for our anniversary.
This sentence is used when one person has created a song or tune (a melody) as a gift or tribute for their anniversary.