This is the 911th most frequent Croatian word.
novo
"Novo" in Croatian means "new."
Here, 'novo' is an adjective, modifying 'računalo' (computer) and indicates novelty or freshness.
Imam novo računalo.
I have a new computer.
'Novo' describes 'nešto' (something), using the neuter adjective form to denote something newly perceived.
Čujem nešto novo u pjesmi.
I hear something new in the song.
In this case, 'novo' modifies 'pravilo' (rule) to represent its status as newly created or introduced.