Sepik Iwam, or Yawenian, is a language of Papua New Guinea.
It is the lexical basis of the Hauna trade pidgin.
It is spoken in villages such as Iniok (4°17′28″S 142°00′36″E / 4.291°S 142.01°E / -4.291; 142.01 (Iniok)) in Tunap/Hunstein Rural LLG of East Sepik Province.
[2][3] Sepik Iwam pronouns:[4]: 282 Sepik Iwam subject agreement suffixes are:[4] The structure of this subject agreement paradigm can be traced back to Proto-Sepik, although the morphemes themselves do not seem to be directly related to the reconstructed Proto-Sepik forms.
Like May River Iwam, Sepik Iwam has periodic tense, for instance the matutinal -iyakwok.