Asụsụ Boiken

Boiken (Nucum, Yangoru) bụ otu n'ime asụsụ ndị Ndu nke mpaghara Sepik River nke ugwu Papua New Guinea . A na-asụ ya gburugburu Boiken Creek na Yangoru-Saussia District, East Sepik Province na àgwàetiti ndị dị n'akụkụ dị n'akụkụ oke osimiri nke ugwu Papua New Guinea. 

 fonology 
+Consonants Boiken  Labial eze Alveolar Dorsal Glottal imi m n̪ n ( ŋ ) Kwụsị p t k ( ʔ ) Mmekọrịta t̪s̪  Nke na-ese okwu enweghị olu ɸ s x kwuputara ɣ Odika w l̪ j Trill r Mpịakọta ɺ

 Kwụsị ụda /p, t̪s̪, t, k/ ka a na-anụ ya [b, d̪z̪, d, ɡ] mgbe ị na-eso ogbo imi.
 /k/ nwere allophone nke glottal [ʔ] n'ọnọdụ ikpeazụ, ma ọ bụ mgbe ọ na-ebute consonant n'ọnọdụ etiti okwu.
 Enwere ike ịkpọ ụda /ɸ, s, x/ dị ka [β, z, ɣ] n'ọkwa intervocalic.
 A na-anụ /n/ dị ka [ŋ] mgbe ọ na-aga n'ihu consonants velar, ma ọ bụ n'efu na ọnọdụ ikpeazụ.
 Enwere ike ịnụ /r/ dị ka trill [r̥] na-enweghị olu n'ọnọdụ mmalite okwu.

+Udaume Boiken Freudenburg, Allen & Marlene (1974). Boiken phonemes. In Richard Loving (ed.), Phonologies of four Papua New Guinea languages: Ukarumpa: Summer Institute of Linguistics. pp. 97–127.N'ihu Central Azu Mechie i ɨ u N'etiti e ə o Mepee æ a ɒ

 /ɨ, ə/ nwere allophone nke [ɪ, ɛ] mgbe ị na-eso eze na ụda alveolar.
 /u/ nwere allophone nke [ʊ] mgbe aga /k/ nụrụ dị ka glottal [ʔ] na okwu-medial na okwu-ikpeazụ.
 /o/ nwere allophone nke [ɔ] mgbe a na-eso ụda labial na velar.

 Ntụaka 

 Njikọ mpụga 

 Paradisec nwere nchịkọta abụọ nke ihe Arthur Capell nke gụnyere Boiken ( AC1 na AC2 ) yana ndetu sitere na ọrụ Don Laycock ( DL2 ) nchịkọta ndị a niile na-emeghe ohere.