Sobei reflexes of some common Austronesian etyma include ima 'hand', betwe 'star', daidu 'two', faso 'paddle', fau 'four', mam 'father', nen 'mother', natu '(his/her) child', niwe 'coconut', pana 'food', puwe 'betelnut', rani 'water', rau 'leaf', -sa 'up', -si 'down', siso 'breast', tafi 'sugarcane', tano 'rain', temto 'man', tesese 'one', tou 'three', wane 'sand', yafu 'fire' (all gleaned from J. Sterner 1975).
Sobei distinguishes alienable possession from inalienable possession by directly suffixing nouns in the latter type of relationship, principally body parts and kin terms.
The intermediate -ri- before the possessive suffix serves as a plural marker.
Some kin terms that do not take the possessive suffixes nevertheless have plural forms ending in -(r)i: wawa-ri 'uncle-PL', tinan-i 'mother-PL', nabai-yi 'cousin-PL' (Sterner 1976).
Sobei verb stems can include a number of aspectual, reciprocal, modificational, or directional affixes, but every verb is minimally prefixed to show the grammatical person and number of its subject and grammatical mood (realis or irrealis).