Problem, you ask? Indeedy: there's a fair bit of bow use in the Old Testament but it turns out the Oroko have no word for it. Here in the rainforest, it seems, spears sufficed for the ancestors' hunting needs. I guess the trees are so plenteous the range offered by a bow is not needed.
"Spear-gun" was one suggestion but it doesn't quite capture it, does it?
Fancy that, needing to make a glossary entry for "bow" in a tribal culture.