To know how to say "grandfather" in a specific Dene language, you need to specify which language you're interested in.
For example:
* Chipewyan: "naga" (for paternal grandfather), "niza" (for maternal grandfather)
* Slavey: "naga" (for paternal grandfather), "niza" (for maternal grandfather)
* Dogrib: "naga" (for paternal grandfather), "niza" (for maternal grandfather)
* Tlicho: "naga" (for paternal grandfather), "niza" (for maternal grandfather)
* South Slavey: "naga" (for paternal grandfather), "niza" (for maternal grandfather)
If you tell me which specific Dene language you're interested in, I can provide you with the correct word.