ostinato
Concise Oxford English Dictionary © 2008 Oxford University Press:
ostinato /ˌɒstɪˈnɑːtəʊ/
▶noun (pl. ostinatos or ostinati /-ti/) a continually repeated musical phrase or rhythm.
– origin Ital., lit. ‘obstinate’.
'ostinato' also found in these Oxford entries:

