\dynamic "f" \italic "subito" as one word

[Albert Einstein]

I need to move down  f  subito. To do this \dynamic f \italic subito 
must  be declared as one word.
What changes must be set into this command in v 2.2.5:

r8_\markup{\combine "" \translate #'( 0 . -1 ) \word #" \dynamic "f" 
\italic "subito" "}

Albert