Blust, Robert (2013). "5: The lexicon". The Austronesian languages (ed. dikemaskini). Canberra, Australia: Universiti Nasional Australia. m/s. 321–322, 324–325. ISBN9780858836020. The word for ‘navel’ is a metaphor for ‘center’ in widely separated languages, as in Malay pusat ‘navel; center’...