common noun. mouth of (e.g. a river)
Ada waalsga gyet, g̱aks wilt 'waasga na süü 'wiileeksm aksga, gu 'nii ḵ'ala Gitsmḵ'eelm. And this they did until they came to a large river, which was the KitsmKalum River.
adat 'waasga süü Kluusms they found the mouth of the Nass River

Related entries: sg̱asüü  mouth of river | Compound süü aks  mouth of river

Bibliographic sources: Dunn, Practical Dictionary entry 1791.