Since he did not reconstruct prenasalised obstruents word-initially he speculated that the appearance of 鼻音漸變 initials in OC languages corresponding to simple initials in the western languages might be a residue of the process of homorganic nasal accretion in forms once prefixed with *maŋ- or *paŋ-. This explanation is superficially plausible, but is difficult to apply to words like POC *bune ‘pigeon’, or boRok ‘pig’.