François, Alexandre. Phonotactics and the prestopped velar lateral in Hiw: Resolving the ambiguity of a complex segment. 2010. hh:phon:Francois:Hiw
The velar lateral affricate patterns as a prestopped approximant, and is from Proto-North Central Vanuatu *r.
/w/ is consistently notated as /w/ [w], but it patterns as if it were /ɣʷ/, so this is included here as an alternate form.